The latest daily deals are available:
Killing Floor Bundle for $6.99 (Just $4.99 without the DLCs)
Tom Clancy’s H.A.W.X. 2 for $33.49
Eve Online Incursion for $4.99 (MMO so there will be a monthly fee)
Serious Sam HD Gold Edition for $3.99 (Or buy the Serious Sam HD: Double Pack which is only missing the original versions of Serious Sam 1 and 2 for $2.99
Mirror’s Edge for $4.99
Cities XL 2011 for $19.99
Neverwinter Nights 2 Plantinum for $9.99
Street Fighter IV for $14.99 (This has been cheaper before)
Machinarium for $2.99
Lost Planet 2 for $19.99 (I’ve seen Steam keys cheaper on ebay)
Star Wars: Knights of the Old Republic for $2.49
Victoria II for 70% off
The daily indie deal:
Power of Defense $2.50 (Same price as Direct2Drive (D2D))