I personally like Rick Cooks Wiz series best of all. Computer programmer falls into a magic world (literally) and dicovers that he can write a magic compiler. It's pretty straight magic and adventure in the first couple of books, but the humor is all built around things computer geeks would get best. By the fourth of fifth book it's mostly about the jokes, but for those in the business they are a riot. I swear that I was at the party he describes at Comdex in one of the books where they come back to Earth.
He starts alot of the chapters with pithy "quotes" from the hero, or others. One I like is:
"Magic is real - unless declared integer."
There's a web page of more of the quotes at:
http://www.geocities.com/Area51/Rampart/5347/sf027.html