Yeah, again I'm with Lolo Uila. The new Compiz-Fusion is a dog. Also, I would hardly consider ccsm "identical" to the Beryl Manager. One only needs to pull up some screenshots in Google to see that it's a confusing mess. My point was not that C-F lacks effects from Beryl, but rather there are far too many of them in Compiz Fusion. And many are indeed useless in terms of improving productivity. Conventions such as compositing window managers are supposed to provide subtle effects that compliment and enhance the work flow, not get in the way. See the Apple Macintosh's OS-X as a shining example. When you're waiting 30 seconds for your window to "burn" away, or your screen is tearing as you drag a window over several others then the compositing manager has gotten in your way rather than ushered you along in your work flow.
As for running Feisty's Beryl debs on Gutsy, it works fine. Now whether or not they'll continue work on Ubuntu 8.04 and it's derivitives is another story. Perhaps by then, the Compiz folks will have their act together. As I mentioned earlier, Beryl is pretty independent. Even vanilla Debian Beryl debs work fine on Ubuntu. I simply went to /var/cache/apt/archives/ directory and fetched the 16 or so Beryl related debs I have installed on my system and copied them to a folder in my Downloads directory. These I archive to my server for reinstallation on distros that insist on using Compiz as the default. Simply go into the folder containing your Beryl debs and open a terminal. Issue the command "dpkg -i *.deb". Afterwards, you'll need to startup the beryl-manager as usual. Make sure you uninstall Compiz and all of its nonsense first. Good luck!
*** EDIT ***
If you go to the aforementioned directory but cannot find the Beryl debs, then open Synaptic; search on keyword "beryl" and then reinstall all components you already have installed (this will replace the debs in the archives directory mentioned above.) Now you can go to /var/cache/apt/archives/ and copy the debs.