In response to a few email requests, I'm putting these lecture notes from an old Mathematica course up here. I've updated them to work with the latest version of Mathematica.
Lecture notes for the Mathematica as a foundation for economic analysis course at the Newschool for Social Research in 2005 are here in Mathematica notebook format. The main set of notes are in .nb, as people may need access to some of the code I've written in the appendices for other things they might like to do.
Update 24.4.2010. Five years later, and people still want these things. Wow. Here are version 0.9 of the notes in zipped .nb format. Most of the functions aren't evaluated. Just about everything should work with Mathematica 7. You're free to do what you want with these notes, but please give credit where it is due. Email me if you spot a bug or a typo, I'll fix these every 6 months or so.