It's unlikely with any GMA or shared memory video controller to get the Aero interface. But this does not mean it was not Vista ready. There's a longer discussion in the Vista forum but with just a bit more information about the laptop this and the upgrade question could be dispensed with quickly.
Just one note, that upgrade if possible will be from Dell.com
I recently bought an inspiron Dell 630 with vista premium.I am not getting the 3D effect or the aero features. When checked I came to know that it was due to the integrated graphics, Can I change the graphic card Is it expensive or Do I have to change the mother board itself will it be expensive?