http://chir.ag/stuff/sand/ I found this on digg.com, which has become my favorite site. It seems to be very CPU intensive, so it might not work too well on an older computer. A poster name Chime gave a good explanation:
"It's like a zen garden. There's really no point to it except to play around and see how things flow. One thing I love doing is stopping the Time (Speed x 0) and setting Pen size to 32. Then I paint Wall over the entire area. Next change pen size to 2-4 and use eraser to dig tunnels in the wall. It lets you simulate pipelines, drains, clogs etc. Pretty fun.
There's a lot of other things you can do, especially with the namekuji. Namekuji is the blobby slug thing that grows when it soaks up water and shrinks when salt is added. Plants grow with water and sprouts shed water when you pour salt on them. Cera is wax and burns slowly. If you fill a cera bowl with oil and set the bottom of the cera to fire, it takes a while before the fire gets to the oil, but when it does, everything burns up pretty fast."
Also
http://www.handdrawngames.com/DesktopTD/ owned me for a few hours.
By the way, I'm doing good, just plugging away at the job and agonizing over my entrepreneurial future. I visited Corey, Whitney, Chris, Christy, and Jill at the beach, stayed over for the night and had a bit of fun at the beach. Although coming into work with a sunburn after calling in "sick" was not so good. :) My ankles got the worst of the sunburn, go figure.