Destructoid is reporting that
D3Publisher has announced some special prices on the downloadable versions of many of their PlayStation Portable games through the PlayStation Network. These discounts are only available on the digital distribution versions of the games, not the UMD releases. The sale, which would be particularly useful to PSPGo owners, consists of the following titles:
$12.99- Ben Ten: Protector of Earth
$9.99- Dead Head Fred, PQ2: Practical Intelligence Quotient 2, Puzzle Quest: Challenge of the Warlords
$7.99- WTF: Work Time Fun
$4.99- Cube, PQ: Practical Intelligence Quotient