Are iphone apps part of social media?

[M]

While I dare say an iPhone app would be a great idea, I wouldn't say it's social media.

Social media is where people who are usually consumers become producers. It gives everyone a voice. You'll want to target places where everyone has the ability to talk to everyone. Think Twitter and Facebook and you can't go far wrong.

What you'll want to be doing is focusing on the question "Why would people want to share this?".

Just an idea off the top of my head, have a look into Foursquare. It's a social site where people "check in" to places they've been to earn points and whatnot. How about getting a free drink if they're the mayor of the bar?

Essentially, try and get people to engage with what you're trying to promote. Can't go far wrong. =]