Madworld port? The developer seems unhappy with sales so far, could be worth releasing on PSN as an experiment.
I guess potentially third part titles using motion controls like Raving Rabbits.
I suspect however they meant more current developments - i.e. going forward why release only on Wii when you could release on Wii / PS3? Given the HD nature of PS3 though it raises another question - do they release with Wii graphics as say a PSN title (which would be fine by me) or do they invest more to produce an HD version on PS3 with higher resolution, etc?
Also, Sony has a policy of late arrivals having new content, so I suppose any ports of already released titles might have some additional content.
Try to be reasonable... its easier than you think...