I saw a discussion on this the other day - the Avid Juicy 7s were mentioned as good for small hands, and there was some disagreement as to whether the Magura LouiseFR were adjustable enough or not. I have Juicy 5's myself, and can vouch for them being a nice brake to use, but I have really long fingers so haven't needed to do any adjusting to them. I assume the adjustability would be the same as with the Juicy 7's.

This is the thread I was looking at:
http://bb.nsmb.com/showthread.php?t=71784

Hope that helps a bit.

A.