I upgraded AmdAntec over the weekend to Ubuntu breezy. Due to traffic, a straight apt-get dist-upgrade said it was going to take 14 hours, so I used bittorrent to grab the .iso, mounted it with losetup, and ran a little python BasicHttpServer.
Ho-hum. The screen was stuck at 640x480 until I did dpkg-reconfigure xserver-xorg a few times. And I can't get sound to work (2.6.3 seems to be the last kernel that works with my sound card, and breezy defaults to 2.6.10).