You can get:
Shaun White: Snowboarding ($64.00)
Animal Crossing ($79.00)
Wii Music ($79.00)
Disaster: Day of Crisis ($79.00)
Sonic: Unleashed ($64.00)
Rayman Ravin Rabbids Tv Party ($59.00)
For FREE at JB Hi Fi.
When you trade in My Sims + Boom Blox $14.95 each at Target
EDIT:
Ill set it out for you guys
BUY:
MySims $14.95
Boom Blox $14.95
= Free Wii Game from the above list from JB : )
Exclusion List:
Ultimately the price which you will be paying will be $14.95 + $14.95 + $29 = $58.90.
Not really a bargain considering you have to go through the Christmas crowd/queues and you have to make sure that those items are in stock. IMHO the effort outweighs the benefits.