I was thinking: we could have some site where we could exchange mapping services, offering to do something or asking to have something mapped.

For example, a mapper could offer:

• I will map your city for a beer
• I will name some streets for a postcard
• I will map every tree in a park for a T-shirt
• I will survey some street names for nothing, because I just like it

A user could also offer:

• I will pay a cake for mapping every building in my neighborhood
• I will give a big thanks in OSM diary if somebody map my small town
• I will send some cookies if you map the lake where I fish

I don’t know if “I will walk your dog and map whatever I see at the street. I will only use your dog as an excuse to map.” fits in mapper or user, but the service should allow cases like this too.

But I lack the skills, time and everything else for this.

As a real example, I will pay 10 dollars to have this thing running as fast as possible (code here).

I will also map a small town for such trading service ;-)