Heh, if I buyed the versions for the consoles I own, I would have had to buy all of them!
Nah, I just got the Wii and PSP versions. One at home and one while travelling/at work. The Wii's the main version and the PSP looked the most different, but still with good graphics.
I have only bought a PSP this year, but it wasn't just for Staff of Kings... although I do admit I kept it in mind! :P