There's an app called Bump that allows you to create a business card of sorts with any of the info you want on it and you can transfer it to other iphone and ipod touch users with the Bump application simply by Bumping hands. It's supposed to be pretty neat. On a related note, have any of you guys seen the amount of revenue some of these companies are receiving for their applications? I think I read around 200,000/month for some single applications alone.