Dave Walk
I had an idea once of an app that was fully customizable and "hackable" - people could create their own personalized world that made their experience unique. I guess it would be a social network b/c I don't know what else could get enough people to congregate around. It's funny because this is basically what Myspace was - although maybe it was too early or it just leads people to create ugly, slow pages.
🏒 Lucian Marin
If you have time for it, I say you should give it a try. You can always impose some limitation to not end up like MySpace. Or you can have designers and developers build the parts and sell them.