I would like to add my BFG program to the first post of this thread, under 'Not exactly Free but popular "earn" Bitcoin sites'.

The BFG Program (Bitcoins For Gets)

http://bfg.swfchan.com/?start

All you have to do is link to swfchan and I pay you bitcoins for each new visitor (IP) that watches at least one flash.

There's a video that explains how to make an account and start earning here:

http://www.youtube.com/watch?v=ozv-stsZlG8

You can find some more info in the service announcement thread:

https://bitcointalk.org/index.php?topic=257118.0