I know it's still fairly early and only Tuesday, but you need to pump yourself up for the second Humble Indie Bundle. The games included are Braid, Cortex Command, Machinarium, Osmos, and Revenge of the Titans.
As per tradition, you can pay as much or as little as you want, and split up your money between the developers, Child's Play, or the Electronic Frontier Foundation using some way-too-fun sliders. What's more, this bundle applies to Mac, Linux, and Windows, so no one is left out. Also, there's no DRM.
All of the titles are quality, and I should point out that Revenge of the Titans actually just came out today. Do yourself a favor and jump on this good cause.