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. S---. 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.