I was thinking of improving my python and just recently read an article about the python-fuse library. I'm always interested about filesystem stuff so I thought this would be a good library to hack on. 
What I can't come up with is an idea of what I should implement with this. Do you guys have any suggestions or ideas that you can share?
The typical 'cool' things with FUSE are exposing in a filesystem interface things that aren't files, and usually are stored somewhere else.
Existing examples: Gmail filesystem, SSH filesystem.
Non existing (that I know of) examples: a Twitter filesystem, that shows tweets as files. Or a Stack Overflow filesystem, questions and answers as files.
interesting project that I can implement with fuse-python