Check this out. It’s called Hue, and it’s actually very cool. It’s pricey, but nice. You can use your iOS device to adjust the light’s color.
Three bulbs will set you back $199 (again, it’s not cheap) but that includes the wireless link that supports up to 50 bulbs. You can buy more bulbs for $50 each.
We doubt most normal people will ever own 50 such bulbs. Some could be good in the bedroom or bathroom for nice, dim mood-lighting.