Ubuntu! No way dude...YOUbuntu!
My first web dev job was a company that exclusively used iMacs and Apache back in 2000. It busted with most of the other .coms... These days I'm all Microsoft all the time (.Net, etc) for day job, so its been refreshing to look back in on Linux.
I just installed Ubuntu 8.10 based on a friend's suggestion, and have been having a great, yet semi-frustrating time totally dorking out.
Thanks for the great site for questions.