Whats stopping you.
how about this:
I don't know if 8.04 is as stable as 7.10. I think I might go back
I actually have two computers with ubuntu, one I use for work and needs to be stable. I'm going to wait a bit before upgrading that one.
I have a laptop with ubuntu/xp dual boot. I mainly use that for fooling around so I'll probably upgrade that tonight. (if i dont waste my whole night here:))