The Crowdtilt API can easily power something like Selfstarter and significantly improve its features by offering support to multiple payment processors instead of just Amazon Payments. It also provides collaboration tools for the supporting community as mentioned by my co-founder http://news.ycombinator.com/item?id=4911765

Selfstarter is really cool for a one-off type of project such as Lockitron, but with the Crowdtilt API, you can also build a "kickstarter-as-a-service" type of product, which I would really love to see built one day.

(disclosure: I'm one of the Crowdtilt founders)