(this entry was made on my shiny new laptop, Theta)
So far, most stuff has gone really smoothly. Ubuntu did a fantastic job of auto-detecting stuff (display, ethernet & sound, for instance). Wifi wasn't so smooth; it's a bcm43xx chipset, that currently requires a binary-blob in the driver. There's a "Restricted Drivers" thing to turn on such drivers, but even after doing that it Just Doesn't Work (TM).
Some quick searches showed people having more success with ndiswrapper and the Windows drivers, which I can attest works. So, Wifi is good! Apparently, Linux 2.6.24 will include a new driver, which will be worth testing.
Some things are still problematic - suspend doesn't work properly (but hibernation does, at least). Compiz works, but I can no longer play videos back (known problem). Both of those I'd love fixed, but both I can live without.
Files are all copied from dear old Kappa - Missy's user account Just Worked (TM) after her files were copied in. I've started a fresh profile, and am just migrating individual app's data across as I want it. The CPU blows kappa's away (even in 32-bit mode) - video playback that dropped frames on kappa due to CPU exhaustion, doesn't even use 20% CPU on Theta. (For so many reasons - SSE/SSE2/SSSE3, extra L1 cache, extra optimisations on x86...).
It's also notable for not having wild video issues, having a battery life longer than 30 minutes, and supporting WPA. Whoo!
Finally - If I didn't manage to catch up with you already this week, Merry Christmas / Happy New Year. It's a busy week when you have three children and heaps of family to see, so I can't see everyone at once :). Ciao!