This might've already been posted somewhere else, but I just discovered this AFTER I bought my Bridgestone Potenza RE050A Pole Position tires: http://www.potenza.com/rscca.asp

Essentially you can get a $100 rebate on the following if purchased between April 1 and July 31:
RE-01R
RE050A Pole Position
RE050A
RE960AS Pole Position

Always nice to accidentally save money!