Might as well make a thread for this since it is a weekly occurance.
A fantastic deal this weekend:
Weekend Deal - Greatest Indie Pack Over 75% Off!
February 20, 2009, 10:42 am - Valve - Product Release
Get Five Great Indie Games at an amazing discount - over 75% off!
Eets, Gravitron 2, I-Fluid, Multiwinia and Trials 2. All for ten dollars.
I have Eets and Trials 2 and its worth it just for that. In fact, those are worth a tenner each.