Here's my side project. I've spent a few months working on an iPhone/iPod/iPad app for when the device is docked in speakers so a group of people can vote on music to play. The trick is that you use it from your web browser, not the phone screen.
Now I'm waiting in anticipation of the App Store queue running its course and approving my app, but would love to see what you all think of it. Come see it in action at http://www.youtube.com/watch?v=21scq3ti5Xs.
My after-hours project is getting close to being ready for use. Part of the way it works makes a "limited" beta difficult to do, so I'm collecting registrations from people with an interest now. Let me know what you think of my (minimal) landing page, and register if you'd like to be told when it's ready to go.