I just ordered myself a concealco IWBS (S=sweatshield) for my CZ 40B. My first holster for my first gun!
I was going to wait until I got the holster to give a review, but wanted to tell you that all the Concealco IWB holsters are on sale; $44 (from $60) for their standard IWBA (A=ambidextrous).
I can't really comment on the holster just yet, but the owner of concealco seems like a real nice guy on the phone. He was the only maker that actually checked to see that he could make a CZ 40B holster out of 5 that I contacted. It is still not on his holster list, but he can make it.
Concealco