Remember that it's against the terms to give away keys, the bundle is a unit that is only for the person donating, and so anyone using someone else's key has an unlicensed game. If people do take a key, I'd suggest they donate to charity, as this is the intention of the bundle.
Anyone else having trouble downloading? Mine kept stopping and I had to restart origin to get the download working again, updating to the beta release fixes that. The download speeds are really slow though, probably because of the amount of Humble Bundles bought. Currently getting 15.5kb/s and a 30 hour ETA on sims 3. Great.
Command & Conquer: Red Alert 3 and Populous were added to the bundle, and are redeemable if you have already purchased it.