Chauncellor: I tried the daily build available today from the link you posted, and indeed, success - it no longer freezes at boot, but boots right into X - unfortunately that's where it ends right now, because things are crashing and installation is impossible (it's a daily ocelot, after all), but the mentioned problem is fixed.
Since this could be due the EFI 2.1 update from this morning, I'll go back and try the ubuntu-11.04-desktop-amd64+mac.iso image once more.
Chauncellor: I tried the daily build available today from the link you posted, and indeed, success - it no longer freezes at boot, but boots right into X - unfortunately that's where it ends right now, because things are crashing and installation is impossible (it's a daily ocelot, after all), but the mentioned problem is fixed.
Since this could be due the EFI 2.1 update from this morning, I'll go back and try the ubuntu- 11.04-desktop- amd64+mac. iso image once more.