In Beryl, there was little gem in the notification area for switching window managers, reloading the window manager, and changing window decorators. In Gutsy's repos, there is no notification area icon for doing that. I have a Launchpad PPA where I've packaged it (my first package!). You can add my repo by putting this in your /etc/apt/sources.list
deb http://ppa.launchpad.net/maco.m/ubuntu gutsy main restricted universe multiverseand running
deb-src http://ppa.launchpad.net/maco.m/ubuntu gutsy main restricted universe multiverse
sudo apt-get update && sudo aptitude install fusion-iconIt will likely warn about untrusted repos, but you can ignore that. Alternatively, you can check out the source package and double check for yourself that I haven't mucked with it beyond marking in the dependencies. To run the icon, just put
fusion-iconin a runbox or terminal or add it to your System > Preferences > Sessions > Startup to make it start every time.