CL/P2S just added some new gift cards to the rewards section, available for all US members!
$20 Steam Wallet gift cards
$10 Gaia online
$5 League of Legends starter pack
You can find them in the Gift Card Gallery
They're always on the lookout for more cards to add, so if you have any ideas, please post in the CL/P2S forums! They read all suggestions and look forward to your ideas!