Internet remote control
Today I spent just 25 minutes coming up with the idea of changing my music with my blackberry as a remote control. Knowing nothing about programming for the device I turned to my server farm to write a script.
The server accepts the message with the request, uses some "closest match" logic to know what you're talking about and then plays the music. In my 3 years using Linux I don't think I developed anything so cool (imho) so fast.