Since a number of Pentax users have complained about attempting to get IR camera conversions done by a company in Utah, I should report on an excellent experience I just had with a company in Massachusetts: Digital Silver Imaging.
I sent DSI my old K10D about a month ago for IR conversion. The camera was returned to me in less than two weeks, with the camera cleaned and the conversion done. The result was excellent. Since I shoot mostly very wide (10-17mm zoom and 15mm prime) DSI asked me to send them the camera with the fisheye zoom attached so that they could calibrate it for wide lenses. This they did.
They charged me $260, but till the end of November they're having a sale and will convert DSLRs and hybrids for $199.
(I'm not affiliated with the company but really like what they did!) Here's a sample: there are a couple more in my gallery.