Well, I finally did it. I have bought the Canon EOS 40D and it sits happily on my desk as we speak. I intend to sell my 350D.
I haven't used it yet really so cannot report on much but straight off, the camera itself is very different to the 350D, being much larger and heavier. So much so, that I actually miss the feel of the 350D but I am sure I will adapt.
At some point I will give a report on how I am getting on with the camera...