Sins of a Solar Empire $10 (50% off)
Demigod $10 (50% off)
Galactic Civilizations II Ultimate Edition [includes all expansions] $10 (75% off)
Good until Memorial Day (5/31).
Thanks to kn00tcn for pointing out the whole sale.
http://eastore.ea.com/store/ea/ContentTheme/pbPage.may-graduation-promo
30% off of three games, 20% off of two, and 10% off of one. Works for any full, downloadable PC game. Works on top of the BFBC2, ME2 and Sims 3 discounted prices ($40, $35 and $40 respectively).
http://eastore.ea.com/store/ea/html/pbPage.holiday?
I hate linking to EA, but I saw what seemed to be some slightly decent deals with free shipping, like Burnout Paradise (:360::ps3:) for $15, and Red Alert 3 (:pc:) also for $15.