In the last week, I have used all of the following interpersonal communications technologies. By “used”, I mean actively participated, initiating and responding.

• Voice: Cell phone, Skype VOIP
• Real-time text: Skype IM, Facebook IM
• Narrowcast messaging: Email, LinkedIn, Facebook
• Broadcast messaging: LinkedIn, Facebook, Twitter, blogging (posting and commenting)

I can’t escape the feeling that a form of Gresham’s Law applies here. The worst part of it is that these technologies differ wildly on how device-neutral they are. Right now Facebook and LinkedIn are very poorly adapted to the iPhone. And any thought of having a “universal inbox” is right out of the window….