Adding cameras to our mobile phones made people want to capture every moments, mostly for sharing it with friends (e.g. with MMS and/or Social Networking Sites).

What if we could capture these moments with public cameras that are spread all around our cities?

I could buy a picture of me driving on the highway, thanks to speed cameras, without exceeding speed limits (and pay expensive fines).
I could watch and share the video of myself falling on the pavement, as I did this morning, thanks to CCTV.
I could make a low-cost (and low-burden) music video (like did The Get Out Clause band), thanks to underground and other urban cameras.
…

Your ideas could make cameras more “social” as you could use them for fun (and thus more sympathetic), and it could also generate some revenue.