I now have Release 9.04 (Jaunty) Kernel Linux 2.6.31-2-686 GNOME 2.26.1 Hardware Memory 2.0 GiB Processor 0: Intel(R) Atom(TM) CPU N270 @1.60GHz Processor 1: Intel(R) Atom(TM) CPU N270 @1.60GHz System Status Available Disc Space 270.7 GiB
At least 12.10 for support of your (I presume) GMA500. Personally I use Kubuntu and I think you will find Unity or Gnome 3 to be very slow. If you do not like KDE, you can consider Xubuntu or Lubuntu.
NOTE: There is no 3d support available for the GMA500.