This one was a real pain leopard wouldn't load at all on this one so I resorted to Tiger.  Unfortunatly this particular unit has an AMD based chipset which tends not to get along with Tiger.  On top of that the Radeon 200m graphics will not produce any acceleration.  I did manage after a lot of hassle to get the base system up and running, however the problems that existed made it virtually unusable.  Pressing the volume keys for instance would lock the unit.  No wireless, extremely slow performance (no SSE 3), and a slew of other small problems really made this not worth my time.