Source: PlayStation Store UpdatePixelJunk 3-in-1 Pack PS3 Bundle Sale (PS3) (now $2.00, original price $19.99)
The pack includes PixelJunk Eden, PixelJunk Monsters, and PixelJunk Racers 2nd Lap. The pack does not include the DLC for PixelJunk Eden. I don't know if there's DLC for the other 2 games, but I would guess that if there is, it's not included in the bundle.
I installed the demo for PixelJunk Eden in October 2010 and have been waiting for a sale ever since. Huzzah for patience!
I'm assuming the sale ends Tuesday, so jump on this while it's up!