Awesome. It's really satisfying to quit a job like that... Done it twice. Once when I worked at blockbuster video, went in for my morning shift, called the GM, told him what a tool he was, then told the store manager that she was a self absorbed wench and walked. Didn't have a job lined up in advance, but it was totally worth it.
A while prior to working at Blockbuster, I worked at a bakery. They had hired me to be an assistant manager, but wouldn't you know, they started me out washing dishes... On my 4th day of work, still washing dishes, I slacked off all shift and let all the dishes pile up really really bad. Then at about 7 at night, I just walked out the back door, got in my car and left. Went back a week later to get my paycheck, they were still pissed.