Installed 11.04 beta on a low-end netbook: very happy using it, launching apps and changing desktop with the keyboard only is very easy and extremely usefull. (I tried installing meego on it, but no driver for the wifi nor for the ethernet, so I figured I'd wait for 1.2).

Updated 11.04 Xubuntu on the fanless desktop/media center in my living room: went smoothly, seems a bit better but nothing obvious (apart that vlc against nvidia is now broken...)

Updated 11.04 Kubuntu on my main laptop: update failed, kde doesn't work anymore, still in the process of correcting the mess, command line style...

I guess it would have been wise to wait a bit before upgrading the distro, but as far as unity desktop is concerned it felt quite nice (on a small screen)