PS3 Slim is Now Available in Custom Colors by ColorWare
This is the first PlayStation 3 Slim case mod I've seen... for $149 you can customize the look of your current PS3 Slim, or get a new PlayStation 3 Slim already customized starting at $449 from ColorWare.
Using their http://www.colorwarepc.com/p-187-ps3-slim.aspx interface it allows you to change the color of the PS3 Slim's top, bottom, logo and controllers to see what it will look like in different color combinations. Cool stuff!
To quote: "They have pulled out all the stops to not only colorize the console but the controller as well. You can customize the color of the PS3 logo, the top of the console, or the bottom.
Basically you can turn your PS3 Slim into a technicolor dreamcoat if you wanted. ColorWare would have it no other way. Once colorized, everything is high-gloss and scratch resistant. It's better than a paint job on your car!"
Considering the textured plastic of the new "slim" the old vinyl dye method should work great, though not as many colors as ColorWare offers. Vinyl dying plastic is pretty much fool proof and offers great results. After my warranty is up I will dye mine