I have been using Ubuntu 7.04 on my new Acer 5920G. There were some issues with it. First problem was that I couldn't use the live CD; had to use alternate CD. And the nv drivers didn't seem to work with the 8600M GT vga on this machine, so no X after the first install. After I used a tool named envy to install the latest Nvidia drivers, I had Gnome running and everything looked fine... till i realized my wireless card was not recognized. Being too lazy to try ndiswrapper, I used the machine without the wireless network capabilities for a while.
After beating the laziness, I decided to try Ubuntu Gutsy on the machine. I grabbed the latest alpha alternate CD (Didn't want to waste a blank CD for the live version which might not work) and installed it. And 'Voila!'. Everything was working... Wireless card, bluetooth, sound... Then I installed the latest Nvidia drivers in the repository, restarted X (at least tried to restart it), and I got an X error like :
" Failed to load module wfb ..."I did a quick search on Ubuntu Forums, and found this post . I followed the instructions in the post, and now I have Ubuntu Gutsy running on my notebook.
Compiz Fusion comes out of the box with Ubuntu Gutsy. I like the new effects. And I like that everything concerning the Gnome theme (fonts, effect, icons, etc) are configured from one application (System > Preferences > Appearence).
Ubuntu Gutsy has given me only minor troubles. I guess I won't have to wait till the release =)