Ubuntu Hoary Live 3.5
WOW is all I can say about this OS so far. I'm on it right now. As some of you may know from my re-introduction thread, I'm rather picky. I'm on my P4 3.0 (prescott core) that's running onboard video (intel 915), onboard sound, and onboard 10/100/1000 networking. Well, my resolution (running LIVE remember) is 1280x1024, sound is working, and as you can tell from the fact that I'm able to post, I have networking running.
In the few minutes I've been playing around with it, I've been INCREDBILY impressed. It's got all the essentials, mozilla firefox 1.0, evolution, gaim, openoffice, etc... I haven't found any flaws so far, although I have by no means done an exhaustive search. This has the cleanest default gnome setup that I've ever seen. The menus are laid out very well, and fairly logical. Along with SAM linux, this is the best live cd I've ever used. SAM might take the title if it were capable of booting on this pc (dies horribly), or installing on my p4 2.66 (hangs at formatting drives), but it's nice because of Xfce. If you only keep a couple live cd's around, I definitely recommend this one. Very lightweight, and not so cluttered and bloated like some distros.
Definitely giving this one high marks.