[kasey_junk]

I actually figured out a domain for this idea before I gave up. The problem is I can't figure out how it scales correctly. It ideally would A) have strong network effects B) you would get contact data through your interfaces of choice (iphone, email address book, gmail, android, etc) and would rarely if ever interact with a web gui for the service. It should also have a circles concept so that I can give different people different details.

those all seem to rule out the various business models. hope someone smarter than me figures it out.

[jlees]

You need to find a set of people who are connected and connectors, and who have this kind of problem in spades. Then build in sufficient virality so they all start using it, and as you point out, multi-platform presence. Many folks have tried to replace the business card and failed, but I've seen cards with custom URLs rather than contact details on them; maybe that's one way to go. (QR codes require too much friction.)

[simpixelated]

subscription?

[kasey_junk]

Limits the network effect dramatically. Best I could come up with was some sort of power user tools or something.