I only have 74, but some are games, which are pretty big. And I think the rest of the space is from apps like Airsharing, MobileFiles, and Text Editor since I threw some files into each of those.
I guess I could get rid of some apps since Airsharing and Mobile Files is sort of redundant and I have five twitter clients.
I have a lot more music than this (too much to fit on my iPod) but this is all I really need.
To yamaha106: there will be a button that says 'Manage Attachments' below Additional Options when you're replying to a topic - hit that and it will give you an option to post with an image.