Here's what I'm teaching right now...
I recently began TA'ing and found that I really enjoy it. It's a lot of fun and a great experience. Well, except for the grading!
I have TA'ed:
Spring 2011: CS 154 - Intro to Computer Architecture
Winter 2011: ECE 154 - Intro to Computer Architecture
Winter 2010: ECE 154 - Intro to Computer Architecture