Distribute Ruby applications in a single file
Tar2RubyScript is a tool that packages up your entire Rails application into a single tar file with a special loader so that users can get up and running with one click.
The next step is working out how to package up an entire Rails app, database, and WEBrick (or Mongrel) daemon into a single OS X .app folder so that you can distribute cool Web apps to run on people's local machines. Snippets would be a great candidate for this. I'll post more information when I figure it out!