I have mine now (ended up just waiting for an all lowercase one), and because using CPU is much slower and regex doesn't work in the ocl version I'm not sure it's any use to me. 

That said, other in the community may find it useful!  Often people couldn't care less about the capitalization, but would want it to be at the front of the address IMHO.

As a side note, I think the pooled mining would definitely benefit from that  (and I'll post in a more appropriate forum to that effect once it picks up that I've met the requirements)