Mini-Boom from MPEX
MPEX and I go way back. When I was in grade school, my dad and I drove up from Cincinnati so he could buy me my Canon TX that has served me well ever since.
They also happen to be great at hunting down inexpensive camera gear for us off-camera strobist folks. Every time the Strobist blog covers the next piece of hardware they cook up, I feel myself reaching for the credit card... :D