It's nice to see a good balance between useful App and useful API. I used this feature previously but now I can easily point friends and the rest of the team to it. Data portability alone is worth paying for and the API flexibility lets the available features grow faster than Fullcontact's efforts on their own. Kudos on good work for the front end of identity.
This is a must-have for meetups. I recently just churned through a stack of year-old cards from SXSW and various meetup groups I'd just never gotten around to putting somewhere.
Currently, Salesforce and Google Contacts are the key differentiators.
At present, CardShark lets you push business cards directly to Salesforce and iPhone contacts, as well as Google Contacts (instantly via the FullContact web app). Additional integrations will follow - our goal is to allow users to transcribe business cards and push the contact info to wherever they want (from within one app, without cumbersome syncing).
We simply rolled Salesforce out first due to the fit and size of the market.