Make the photo gallery a true media gallery. Word Docs, pictures, movies, pdf's and literally anything you wish to post and share.
I also think you should beef up the users personal page to be more like myspace with information and presentation to all users. You are 1 step from away from having the ultimate community software. 1 step...
Have a profile display area similar to myspace and expand the user rating system to include all content by selection.
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I have a huge project I am working on right now and I could almost see this being a viable solution for it if you make a few additions.
Message Boards and photos are limiting. I know I can select extension types that are allowed to be uploaded. You should support them with icons etc. to help identify the media. Allow users to have friends pages as well. There are many products offering this type of stuff but not anywhere near as powerful as this software is in permissions, messaging and possible configuration of displayed output.
My thoughts..
