some of you may have saw this on Attack of the Show
http://www.frogtoss.com/verticube
if you've heard about Lumines, the highly acclaimed tetris like puzzle game for the PSP, here is a rip off for the pc. Fun to pass time, or if you're bored at work. Free download. It's not some crappy flash game, it actually has decent background music, and background visuals. Probably not as great at Lumines (havn't played it so I can't speak), but still pretty fun.
You do have to download and install it though. It's a 4 MB download so not too bad.