Dean, I don't have anything against computer-related words as such. I'm just wary of words that are only listed in dictionaries of computer terminology. But if a computer-related word has made it into at least one general dictionary, then it's a strong candidate for admission, just like words from many other specialist domains.
I don't think I'd ever heard of "microsite", but it's listed in a couple of dictionaries that I could see, with both an Internet meaning and an ecology meaning, so it'll go into the list.
(For what it's worth. At present, nine-letter words are not reused in the daily puzzles, but if Chihuahua continues long enough, that policy will have to be relaxed, so maybe one day there'll be a puzzle with four nine-letter words, and "microsite" will be one of them.)
