I picked this up for the PSP during the week at TRU so I got a $10 gift card with purchase - that will definitely come in handy when the TRU exclusive deluxe sets hit in a couple of weeks...
Anyway, the game itself is really fun - I'm almost done with the story mode play through and I've gone back and completed the first three levels on Free Play - so I'm making pretty good progress.
It seems A LOT shorter than the Lego Star Wars II game for the PSP, but perhaps I haven't fully uncovered everything yet.