This is cool!  It has 5MB of on board storage and can handle up to 128 frames. It is Windows compatible, so you’ll need a PC if you want to actually use it to do something other than move air. I think the video on this one shows it off better than any description I could write, so enjoy.

If you’re the type that likes to call attention to yourself, and happen to need to lower the apparent room temperature at the same time, we can think of no better way than with this LED fan. With 42 LEDs mounted on the blades, the LED Art Fan spins and flickers at a brazillian* RPM to create beautiful persistence of vision images. Of course, beauty is in the eye of the beholder, so make sure you behold the video below.

Unbelievable bright images 5 megs of memory holds up to 128 individual frames. You can animate, spin, slide, flash and dissolve to your heart’s delight. All the while, enjoying the cool breeze from a chromed-up art-deco desktop fan.

Via ThinkGeek