$150 per wheel!?! Jeeze, Sheldon Brown charges like $40!

Shop around.

I think Sheldon's site, and the links there are the most extensive you'll find on the subject. There's a guy named Jobst Brandt a book (THE book, really).

I've done it a couple times using Sheldon's site as a guide. I'm hardly accomplished, but they came out OK. Took my time. The hardest thing IMO is spoke calculation. There are several online calculators and spreadsheets for that sort of thing. Still, that was a headache for me.