Eclipse Wall Paint is a new product of ALSA Corp. God knows what is in it, but it starts at a dark color and brightens up into bright whites or blues when touched or heated up in any way.
In case you want to get really crazy with this stuff, it can come with other visual effects called CrystalFX, SpectraFX or Funky Munkey. Check out What happens when you put your face against the wall. Here's another review from Cosmos Magazine. Available for $349 a gallon. (Thanks, Jill & Mary - via Mavromatic.com)
(Re-edited from original post on 2005-09-28 - MGR)