Using Bump's New API To Exchange Data Between Phones
Bump, the Y Combinator funded company that got a lot of attention last year as the Billionth App, has released an API that lets devs use Bump’s bump-to-exchange scheme for swapping data phone-to-phone in their own apps.
The API is free to use unless you are generating revenue as a direct result of a bump, have more than 10,000,000 bumps/month or more than 2,500 simultaneous users.
Integrating the API looks straightforward and uses the protocol/delegate pattern familiar to iPhone devs. Have a look at this tutorial for details.