I buy all the Humble Bundles just on general principles, but this is a HELL of a deal right now to assist the cash-strapped THQ.
Basically if you pay $6 or more, you get (via Steam only) Saints Row 3, Darksiders, Metro 2033, Red Faction Armageddon and the three Company of Heroes games. Ho. Ly. Shit. Darksiders by itself is pretty awesome for a God of War ripoff and well worth the price. Plus if you don't want support THQ, you can just direct all the money to charity. Bravo, THQ.