The purpose of the script is to tell as much as possible, yet in a concise way, what system and software I use. Also, it tells what commands were run to acquire that information. (I have some experience, but it's not huge; point is, I include the script so you'll instantly understand my suggestion.)
I think we should have the veterans (with respect to Unix, Linux, and this site -- those three are probably coinciding anyway) - like I said, I think we should have those guys write such a script.
Then, we should make it possible to upload the result (as a feature, as some users will probably be too paranoid/vain to reveal what they use).
That way, we could get away with all the overhead like "what distribution/DE/DM/WM/etc./etc. do you use?" that accompany so many questions.