Completely custom application written by me in Ruby on Rails. Check it out: http://donotpress.me/
It has a script that automatically updates from its sources.
I can't provide much support running it, but it should run anywhere you can run Ruby on Rails.
Comes with the domains:
donotpress.me - Expires Sat 07/17/2010
donotpush.me - Expires Sat 07/17/2010
dontpress.me - Expires Sat 07/17/2010
donotpressme.com - Expires Fri 07/17/2009
I spent about $100 on the .me domains. Free domain push from namecheap.