ask the hive mind: Camera Repair

My Pentax istD is having problems - I push down the shutter button and it doesn't take the picture. Except that sometimes it does. Yes, the batteries are fresh and the camera is turned on. I've taken several thousand photos with this camera, many of them in les than perfect weather conditions, so I'm not all that surprised that it's decided to have a failure, but I like it and want to keep using it.

Does anyone know of a good camera shop that does repairs on Digital Pentax in the Boston/north area?