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Why are you sure you are connected? In the output of iwconfig for your wireless card (eth1) shows

Access Point: Not-Associated

That means you are not connected to a network. Have you tried connecting through the NetworkManager applet on the panel?

Everything else looks fine, your card appears recognised and configured.

eth1 IEEE 802.11 Nickname:""
Access Point: Not-Associated
Link Quality:5 Signal level:199 Noise level:169
Rx invalid nwid:0 invalid crypt:0 invalid misc:0

inet addr:10.42.43.1

That's an odd IP address for a home wireless router. You should be getting something like 192.168.x.x. What are you connecting to? Is this a business or school wide wireless connection?

Well, your config seems fine so you should be able to connect... So, lets check your connection. Assuming your router has the default settings (see RedWagon's post) otherwise use the IP of your router, open a terminal and type:
Then:
Then post the results here. It may simply be a problem of firefox or whatever, but it still looks to me like you are not actually connected whatever the NetworkManager may say.

Also, be aware that NetworkManager is kinda buggy. Although I have had no problems with the latest version (the one in gloria) I have had various issues with it in the past. You could try installing another wireless manager such as wicd or wlassistant (both in the repositories).

Well, it looks like you are not connected to your network (again, assuming that 192.168.1.1 is your router's IP, if you could check that from another computer that would be great). try the following:

The best case scenario is that you are in fact connected but have not been assigned an IP address. Please post the output of:
If that ends with a line like this (with different numbers) you should be able to surf the web with no problems:

bound to 192.168.1.101 -- renewal in 39598 seconds.

If not, try these steps:

Probably unnecessary but just in case:
Check for available networks: You should see a list of available networks like this:

ath0 Scan completed :
Cell 01 - Address: XX:XX:XX:XX:XX:XX
ESSID:"Wireless Network Name"
Mode:Master
Frequency:2.462 GHz (Channel 11)
Quality=3/94 Signal level=-92 dBm Noise level=-95 dBm
Encryption key:off
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
12 Mb/s; 48 Mb/s
Extra:bcn_int=100

One of them should be yours. The easiest way to continue would be to turn off all security/encryption (WPA/WEP whatever) from your router then: Then run dhclient again: Finally test it again by Post back here with the results, if it works we'll see how to automate it.

This got stuck in a loop looking for something that wasn't there.

What exactly?

dhclient is what allows you to use the DHCP server and get an IP address assigned automatically. Use your mac to log onto the router and check that DHCP is active, and see what the allowed range for DHCP addresses is. If it isn't running, activate it. Then try and assign an IP address (something outside the DHCP range) manually. You can do this graphically by right clicking network manager and choosing "Edit connections".

Just to make sure you really are connected to the router, please post the output of

Mint should have selected the wl kernel module for your Mini's wifi and it should be working immediately on install. No hassles. Assuming you don't have something funny happening with your router.

A few things for me to ask up front:
1. Before you installed Mint, your Mini came with either Ubuntu Hardy (lpia) or Windows. Did you toggle the radio off? From Hardy, did you use the aircraft-manager app to disable your wifi radio, or from Windows did you toggle the radio off? The BCM4312 has an internal firmware OFF switch that you may have toggled. Mint Gloria does not include the aircraft-manager to toggle this back on.
2. When you R-Click on nm-applet on the panel, is the checkbox CHECKED for wireless networking?
3. When you do "lspci -vvnn" and browse for your BCM4312, is the kernel module in use called "wl"?
4. Do you have an ethernet cable plugged into the Mini? Unplug it.

Based on this, I think your wifi is good, your card is enabled, you're using the right kernel module, and everything should work:

eth1 IEEE 802.11 Nickname:""
Access Point: Not-Associated
Link Quality:5 Signal level:199 Noise level:169
Rx invalid nwid:0 invalid crypt:0 invalid misc:0

The wl kernel module with the BCM4312 should configure the wifi as eth1, which is going to look odd to most of the Mint geeks here expecting wlan0 or something else. But eth1 is correct for a Mini-9. I think the whole problem is that you're simply not properly connected to your AP.

Go to nm-applet, R-click, edit your connections, and DELETE your wifi connection. Wait a few seconds, L-click on nm-applet, and reconnect to your AP. This reconnects as if for the first time.

What I don't understand is why your eth1 is identifying as addr:10.42.43.1 if your router is addr:192.168.1.254 and addr:192.168.1.33 is your desktop. Its like your wifi is connected to a different network entirely, not your own.

Ummm...? No idea. What thing exactly?

I suspect you're accidentally hitting the hotkey or mouse shortcut for the desktop switcher, and that you have compiz enabled (which has a very easy shortcut to switch desktops).

Easy solution: disable compiz
Superior solution: remove compiz
Workaround that keeps compiz: use an external mouse, disable the touchpad

The Mini's touchpad is, by default, rather touchy. It is easy, especially if you're not used to it, to accidentally "swipe" and switch to the next desktop. Mint's default install is with compiz enabled, and two desktops, so thats likely what you're doing by accident.

Edit: Based on your new description, this is EXACTLY what you're doing. Disable compiz. Remove it, as you don't need/want it on a Mini.

[removed]

According to your laptop being connected to a 10.43.42.xx is a little odd, but not as odd as others think it to be. A 10.xx.xx.xx is still considered a private address, just not yours. Someone else in your neighborhood close by you set their network up by not following the normal I.P. octets. You are definitely connected to someone's network, just not yours. However if you follow Dave's advice, you should get it back working again. He is spot on when giving advice.

EDIT: Dang posted too late...

Please close your own ticket if this is resolved by amending the original post to prepend [SOLVED] to the subject line.