So, Radiohead released an album and you could pay what you want for it. They never really said how succesful it was - although judging by what I'm about to tell you about (You probably know about it anyway...) it can't be that bad because The Humble Indie Bundle has raised $500,000+ in the last half week, with an average donation of $8.30.
What is it?
For whatever you want to pay, you get:
+ World of Goo
+ Aquaria
+ Gish
+ Lugaru HD
+ Penumbra Overture
Your payment is split evenly between the five developers and two charities - the Electronic Frontier Foundation and Child's Play. (Or indeed whoever you want - you can opt to give it all to charity, or split it how you want)
If nothing else, it's a fantastic opportunity to pick up some great indie games at a small price. As Rock Paper Shotgun said though, don't be a nasty person and give them what they deserve!
Linky Linky-Link-Link.