On this laptop (the missus's) its currently openSUSE 12.3 KDE. Running really nicely actually, and the wife is really happy with it. I've long had a soft spot for openSUSE, and this is a very nice release imho, but by god their forums...so unbelievably unfriendly. I was just flicking through them not long ago, and almost every question is shot to pieces with a grumpy and unnecessary comment. I wish they'd realise how horrible this makes using the distro. Really puts me off, because woe betide you if you need help. And for the love of criminy, don't spell the name wrong!!
On my desktop...well I'm currently running anything on that at the mo because its packed away while we decorate the house. But I'm hoping to have it set up and running Mint 15 Cinnamon in time for the release.