Yup......onboard graphics sucks!!!!! particularly if you want to run vista with the full aero package.
I hav'e tried twice to run vista on my laptop but despite increasing the memory from 1 to 2GB it still struggles.
However XP runs great so now you see how I have my foot in both camps in the XP/Vista debate.
Whatever people try to tell you, onboard and vista does not work !!!!!!!!!!