There were a whole bunch of price drops yesterday on Steam, especially with Sega:
http://forums.steampowered.com/forums/showthread.php?t=518670
Examples:
FlatOut: Ultimate Carnage - $9.99, was $19.99
Clive Barker's Jericho[2] - $9.99, was $39.99
Outrun 2006: Coast 2 Coast[1][3] - $9.99, was $19.99
Overlord - $19.99, was $39.99
RoboBlitz - $9.99, was $14.99
Rogue Trooper - $9.99, was $19.99
Rome: Total War - Alexander[1][3] - $9.99, was $14.99
Rome: Total War - Gold[1][3] - $9.99, was $19.99
Rome: Total War - Complete[1][3] - $9.99, was $29.99
Safecracker: The Ultimate Puzzle Adventure - $4.99, was $9.99
SEGA Rally[1][3] - $19.99, was $49.99
SEGA Rally Revo[7] - $9.99, was $49.99
Shadowgrounds Survivor - $14.99, was $19.99
Shadowgrounds Pack - $19.99, was $24.99
Shattered Suns - $19.99, was $39.99
Shattered Union[5] - $9.99, was $29.99
Sid Meier's Civilization III Complete[5] - $4.99, was 29.99
Sid Meier's Civilization IV: Warlords[5] - $9.99, was $19.99
Sid Meier's Pirates![5] - $9.99, was $29.99
Silverfall - $19.99, was $29.99
SiN Episodes: Emergence - $9.99, was $14.99
Space Empires IV and V Pack - $19.99, was $24.98
Space Siege[5] - $19.99, was $49.99
Stubbs The Zombie - $9.99, was $19.99
The Club[3] - $19.99, was $49.99
Tomb Raider: Anniversary - $19.99, was $29.99
Top Spin 2 - $9.99, was $19.99
UFO: Afterlight - $9.99, was $29.99
Universe at War: Earth Assault - $19.99, was $49.99
Zen of Sudoku - $4.99, was $9.99
I'm tempted to double dip on Outrun and Sega Rally at those prices.
There's some good stuff there. Whip out the credit cards!