I put Fedora Core 3 on my Dell D600 yesterday. It went flawlessly. Everything worked, everything was discovered fine, I have good 3d rendering, sound works, networking works etc. For you Googlers out there, I should point out that I don’t have the wifi card it came with, I bought an 802.11b that’s fully supported and dropped it in there several months ago.
Somehow the backup of my homedir missed a LOT of stuff, so I had to start from scratch with my Enlightenment configs, but it’s not SO bad.
I don’t have a lot more to say about it. Unless you have odd hardware, FC3 works great.