This may be right on the edge of appropriate for Stack Overflow. Feel free to downgrade it if I'm out of line.
I'm looking for a business card reader on the iPhone that will call back my own app via URL scheme.
It's certainly easy enough on the technical side. In your app, you set up the basic URL scheme for yourself. Their app responds to their own and you pass yours in as a parameter. They call you when the user's done. I just need one that, ya know, does that.