Setpixel has undergone several revisions since last it appeared here. A little leaner, more focused on Processing, but still a lab for interesting, impressive and downright funky technological art (QuickTime, Flash required to view demos).
This is fabulous. SHOCKWAVE / FLASH... Setpixel shows you great stuff, explains the mechanics AND lets you download the source files... Who could ask for more. (the start demo buttons are at the bottom of the text column.)