Anyway, yes. I have an extra key for the Humble Frozenbyte Bundle, because I paid more than the average for the latest Humble Bundle ( The Humble Frozen Synapse Bundle (pay what you want and help charity) ).
First person that I know that posts here can have it. :3
Splot (Preorder, includes Demo access available ONLY to Humble Bundle owners)
Jack Claw (Prototype Game)
The first three (and maybe Splot when it's released) are claimable on Steam.