Are we talking about only Nokia devices?

I think there is a glaring gap for a decent OVI-type appstore for Symbian / maemo devices.

Ideally it would need to make a small profit to cover running costs. Maybe through ads and/or take a small cut of the app price (e.g. 10 or 20%)?

Could we use an open-source cart system to sell stuff?

I'm willing to start something up if people are interested.