Thats what I was thinking. The upgrade through 9 was painful (I recall) because of the difficulty mounting shared drives over the network, which is why I ended up moving to 10.04 in the first place. As long as things keep working, I'll be happy with it on my old machine.
Here's a question: I have a drive mounted over the network that I am using Synkron to do backups on, but after a while of copying the drive seems to lock up (the light keeps flashing but I can't access it from any computer on the network). Do you think that's a hard drive problem, a NAS problem (the drive is plugged into an Apple Time Machine), or something with Ubuntu?
Backups are a grizzly bear to get right. I think I'll move the drive to plug into the server and just access it (on the rare occasions I need to) over the Internet through FTP--but I'd rather be able to mount it as a drive in OS X from my laptop so I can run backups onto it from there as well.
In any case, I need to get Ubuntu on a decent machine so I can see how well it really works!