Yes, they make their own (awful) programming language, that spits out VBscript, PHP etc, to write their products in. I kid you not, it's called Wasabi -- though I'm not sure if they use it still.

For all the advice on hiring Joel has given (and its annoying tone for what is, basically, a very simple app company, and not even a very exciting one at that), you'd think they were coding for the space program or something.