Just in time for the Phoenix Forum.
I bought the 20D in April and a few days later learned that the 30D was coming out. So.... I returned the 20D.
I just got a call from the camera store and the 30D is in and waiting for me.
Perfect! Now I can take it to Phoenix!
There really isn't that much difference between the two cameras... but my biggest complaint with the 20D was the samll LCD screen on the back. It's larger on the 30D and there are a few other enhancements as well.
There is a very good review
here.