I have been looking for the same kind of thing, or something like a derelict factory. There are some streets down in Brighton that are full of graffiti, it's just tracking them down.
I have literally just finished downloading the new CS5 Upgrade and will be playing this afternoon. I really would like to have more time and learn Photoshop as well. My knowledge is very basic in photoshop but I can muddle together some processing.
I have not tried any other HDR packages, not even in photoshop. I'll see what the HDR settings are like in CS5 and report back.
The time drawing ever closer for a photography session somewhere I think, there are lots of people interested in photography on here so it makes sense