If you've got a Mac and like OSX, grab a Dell Mini 9 (not 10) or Vostro (business model).
They're really easy to install OSX on. Mine both run full versions of 10.5.7 that get full updates from Apple.
Check this site out for lots of info:
http://mydellmini.com
The Dell Mini 10 is NOT ABLE TO INSTALL OSX! They have a model called the 10v which is the guts of the 9 in a larger case with a normal HDD, but the reviews haven't been to favorable.