My 20D is super !
I shot approximately 1350 photos now and I'm really happy with this gear. Compared with my 'old' D60 it is a big frogleap ahead. 5 frames per second and very fast AF is making the difference here. I'm shooting a lot of Baseball games in the Netherlands, so also the higher ISO values are used often.
There was some dust on the sensor, but I cleaned it easily.
My next purchase will be the new flashgun. It's really cool.
So a very happy D20 user!