Well there are nine million posts on this so no doubt I'll get buried. But that is quite ok.
I have tried off and on since 2000 [sic] to get Linux going. We actually first ran RedHat in the lab in 2000 thanks to someone - an undergrad - a lot smarter than me. Since then we've put up a cluster under RedHat and currently under CentOs. Again thanks to some brilliant undergrads.
My own experience has not been that great until lately. About the only thing I could get going was Xandros. It actually worked pretty well. But Ubuntu is the cat's meow. At 7.10 they finally have it, and I am pretty sure that Hardy will do the trick. I have 7.10 running on three pieces of hardware, two of them flawlessly. The laggard is a Dell laptop that has problems, but is still quite useful.
Congrats to Ubuntu. May then live long and prosper. May they make old hardware new again. May they save school system gazillions of dollars.
One happy old chemist.