Now is the time to buy them, if there are any left at the store.
LEDs are very directional. You can sand them a little to get a more diffused light.
They take WAY less power than incandescent. The plain white ones often have a blue tint. It has to do with the dyes in how they are manufactured.
If you are interested, here are some photos of a light I got at Walmart and converted to a screw in plug for a can light:
http://web.mac.com/benhdvideoguy/iWeb/Home/LED.html