Both of these games are a part of the list for Black Friday Deals -- good through Monday. There was an Infinite Undiscovery with "gift" listed for $19.95 but it is back to 39.95. I suspect these prices will go back up after Monday.
For the PS3, there is a good deal today also: Resistance 2 collectors edition -- $20 off...
For the Wii, they had Animal Crossing with Wii Speak bundle for 39.99 (reg 69.99) but I missed out.
There is a whole list of Friday-Monday games on sale at Amazon -- check the list at Cheap Ass Gamer...
Unfortunately, I've got too many games I want and these are down the list. I'll play them eventually, but I have to finish several others first.