Acropora millepora, or prostrata maybe?
I don't seem to be able to get a good picture of these guys, but they are beauties.

October 2003

October 2004

Pink with yellow tips. Frag from Upscales.

 

Blue tips, pink branches, very shaggy brown hairs. Super fast grower
Here it is October 2003.

And here March 05!

 
Solid light bright blue body, but only shows on the parts that get the brightest light. Other parts are obscured by thick brown "fur".