It's not strictly a sale but a really good deal. Dark Sector on Green Man Gaming for �6.99. This one really flew under my radar but so far i'm finding it quite enjoyable despite the slightly clunky controlls. While I was there I picked up Uplink and NecroVisioN: Lost Company for 1pence each.

If you like Uplink you will love Onlink, it's sorta like the 1.13 mod/patch for Jagged Alliance 2 in that it's free and makes the game tons more enjoyable. Unlike 1.13, you don't need original game to play Onlink, it's basically Uplink for free because they released source code and it's an open project. You seemed to get Uplink for free anyway for 1 penny, heh.
http://www.onlink-mod.net/
As for Tropico 3, I think it's almost identical to original but more balanced and 3d. It's harder than original but I enjoy it. Back when I played first Tropico I was a teen and barely understood the jokes built into the game, so I'm having a blast with Tropico 3 now. My opinion it's a 7/10 game and only thing it could use to get 7.5/10 is a little more code optimization.

Videogamesplus.ca sale, 500+ items, up to 80% off -- http://www.videogamesplus.ca/specials.php
No PC games though..
There's international shipping.

Once I get my paycheck...sold for 10 bucks.

Gamersgate now following Steam's path: buy these games and you'll get both PC & Mac version.
Direct2Drive:
Bob Came in Pieces 50% off ($4.99)
Tropico 3 50% off ($.14.99)

ShopTo weekend sale. Some good deals in there, but most things are simply the price they're usually at.

According to their official Twitter page, your credit card is authorized but not actually charged one pence. At least, that's what they say on Twitter. :P

Seems to be true as there was no deduction from my card. I think everyone can agree Uplink and NecroVisioN:LC are wonderful freebies.

Men of War:
MP for free, Starting from May 11 through May 23, 2010.
http://eng.bestway.com.ua/index.php/special-offers
http://www.digitalmindsoft.eu/forums/viewtopic.php?f=119&t=1131

Bioshock 2 Rapture Edition for £15.

I can confirm that.

[url=http://www.direct2drive.com/2/3119/product/Buy-Rome:-Total-War-Gold-Edition-Download]Rome Total War:Gold[/url] for $2.50 as well. Worldwide except the Asian countries (man, you guys get hosed a lot).

If you use code COMRADEUS20/COMRADEUK20/COMRADEEU20 (depends on whether you use US/UK/EU store) on D2D you'll get 20 percent off your purchase. It's supposed to end sometime today, so act quick!

Thanks for the code - Finally picked up Torchlight at 70% off. ;-)