God Ian. They put out 3 Metroid games in the last 4 years, after having none for something like 8 years, and you call it whoring.
Meanwhile, on the PS2/PSP, we've seen no less than 5 Jak and Daxter games, including 3 platformers, a racing game, and a portable platformer. Hell, we could argue that the Ratchet and Clank games are hardly different, and there's been 4 of those, and I gaurantee one will appear on the PSP. 9 so far, 10 likely, and more to appear on the PS3.
In contrast, we've seen one true Mario platformer, two incredibly well-made not-rushed FPA games, a deathmatch game on the DS, and several new franchises.
EVERY COMPANY REHASHES. Nintendo will do it so long as it remains profitable. But they don't even come close to other companies. It's laughable to accuse them of that in light of what other people are doing.
Also, you claim to be worried about system selling capability, yet you think not using an appropriate and known franchise is a bad way to do so? You can't have it both ways, period. That would be like not calling the next Mario game a Mario game.