Ubuntu 7.04 (Feisty Fawn) arrived just a few days ago with promises of better hardware compatibility, included proprietary software and drivers, and more user friendliness.  If you are a Windows user take a peak at this review (or this one at CNET) that will give you a quick rundown on why you may or may not want to switch. Here's a bit:

So is it time to make the switch? Well, taking into account that Vista doesn't boot anymore - I don't really seem to have a choice. Not at the moment at least, since my Vista DVD is at my other apartment which I wont be going to until next week. Until them I'm stuck with Ubuntu and you know what? It doesn't feel half bad. In fact it feels kinda good. I'm using my laptop and doing all the stuff I'd normally do in Windows - for free! It's amazing actually! There's nothing I'd have in Windows that I miss right now. Ok, Photoshop and InDesign are issues, but I can use those apps on my desktop if I need to. With the great advancements that's been made in the user friendliness in Ubuntu 7.04 - I believe I'm finally, after all these years, to at least make a partial switch to Linux. I don't think I'll install Vista on this laptop ever again. My hat is off to the Ubuntu team! Switch now and never regret it.