I swear, they are making these mega-sales harder and harder to track.
There is an obscene amount of deals going on, so I encourage you to look through them yourself, because there is no way I can catalog them all. Feel free to post any that you think have slipped under the cracks.
Today's deals:
[http://store.steampowered.com/sub/6945/]
$10
[http://store.steampowered.com/app/21000/]
$5
[http://store.steampowered.com/sub/1481/]
$8
[http://store.steampowered.com/app/40800/]
$3.75
[http://store.steampowered.com/sub/402/]
$5
[http://store.steampowered.com/app/44310/]
$20
[http://store.steampowered.com/sub/296/]
$3
[http://store.steampowered.com/app/24960/]
$6.80
[http://store.steampowered.com/app/400/]
$2.25 or $3.75 if you don't own HL2
[http://store.steampowered.com/app/22370/]
$20.10
[http://store.steampowered.com/sub/6951/]
$12.50
[http://store.steampowered.com/sale/holiday2010_princeofpersia]
75% off whole series
Game prices range from $2.50-$7.50
You can now add me as a friend of Steam and see the mini-reviews that pop up in the store on the titles I've played long enough to get a good feel for. My account is Signa8.