Yup sure. Sorry for the delay!
Firstly ignore any icons of the documents you can see in the itunes backup folder, those are just the preview icons and don't contain your text files.
I worked this next bit out by finding just one of the files by brute force searching but you can just do the following.
1. COPY your whole backup folder (via library/application support/mobile sync) to the desktop. Make sure that's just a copy!
2 Download Easy Find and Name Mangler - both free.
3. Use Name Mangler to rename all the files with .txt at the end. This will let you search them.
4. Use Easy Find to search all the files in that folder for the phrase 'paragraphstyle' (one word). That phrase was unique to Pages files on my machine.
5. Once Easy Find has located them, you can drag & drop them to a new folder.
6. Then you can open them with any word processor. You'll see lots of garbage in the file, but further down you'll see your text. There will be a bit of repeating, I guess from the autosave process, but it's a snip to trim it down to the original file.
Hope that makes sense, just shout if it doesn't..
Good luck!
PS for anyone reading this at Apple - this is how you HELP people.