Ahoy thar Mateys! Have any of you done an IR (infrared) conversion to one of your dslr bodies? If so, which company did you use and ultimately, was it worth the cost?

I have a spare d100 that I am considering converting, or possibly my d200 which I am now using as my backup body. I love IR photography, but I'm just not sure if it is worth the expense.

Your input is greatly appreciated.