Here's our description on their site at Developer Sandbox @ Google I/O
VendAsta is sowing trust by making social context portable. With our applications StepRep (for small businesses) and MashedIn (for bloggers and website owners), the networks you've built up on Facebook, Twitter, etc. can extend to you and your social connections all over the web.
We use App Engine to host our core products. We leverage Open Social, Maps, and Social Graph API in our products. In addition, VendAsta uses Google Apps and Analytics extensively for running its core business. VendAsta is the developer of the open source library asynctools, which allows developers to perform App Engine API calls in parallel, most notably datastore queries.