We've had ours done three times. The first was a photographer who came to our local pet store. They were pretty good, but fairly expensive. I think to get a CD with 6 poses on was around $100 (and then you printed your own). We've had the same pet photographer do them twice. The first time was at the Michigan Yorkie Fair last year and the second time was at one of our local meet-ups. He does a great job and is extremely reasonable (I think we got 4 different 5x7's plus 8 wallets for $40).
This is from the pet store photographer:
This was of the first session with the 2nd photographer at the Yorkie Fair:
These are from our last session in December 2007:
