Nocster.com or Fastservers.net
Pros and cons of both, but price is decent... its so hard to ever decide. I'm going through a mini-fundraising campaign on my site right now, we'll see how much I bring in by the end of the year and I'll see what I can afford.
Also, a buddy of mine works in the server industry, and can probably get me compaq and HP servers AT cost. He's running some price checks for me today, so if I can get one cheap, I may just co-locate as well.
So many choices
