I've been quite averse to just keep my computer running 24/7 because of how much kilowatt hours that can consume. Since a R-Pi has little power requirements, I'm willing to run that all the time and therefore do more interesting things than the standard file hosting and bittorrent.
I take a lot of photos with my cellphone though I rarely upload them to the internet, which is sad because I have a lot of funny stuff to share.
When the Raspberry Pi comes out I'll be sure to test/document/publish this for others to enjoy. There's a little more work to do to generate the index page that links to all of the image galleries that are generated, and also the process to make it work is somewhat long-winded.