I just installed 10.04 on an HP mini (using it now). Is the server edition that far behind the curve or are you just being conservative?
BTW, I frikkin love Ubuntu. It's going to seep into the market quietly over the next couple/few years. I'm so glad to see Gates and Jobs having some of their market taken away, even if it's only a couple of percentage points.
If you use Ubuntu as a notebook/desktop, check out Guake if you're unfamiliar with it: