[car]

I hadn't looked at it from this perspective, thank you for the enlightenment. I'm just too impatient.

What irks me is that the IETF keeps banging away at protocols to solve issues like the transition from PSTN to IP (e.g. ENUM), or IM interoperability, but then nobody really implements them, or as in the case of ENUM, the incumbent telcos, at least in the USA, sit on it forever. Or some startup cooks up their own solution and kills it, like Skype.

I'm all for interoperability sorting itself out, but it does not seem to happen in the messaging/real time communications space. We still have SMS, a gazillion IM protocols, and many isolated islands of video calling. Skype, Qik, MSN, Yahoo, FaceTime, Google, I could go on. On top of that is the confounding issue of different audio and video codecs and whatever patent issues surround them. A formidable gordian knot, of which it will be interesting to see how it will be cut - if ever.

[jeffool]

I'm far too impatient as well, I suppose. It seems to me (from the armchair where I quarterback) that IM interoperability isn't happening not because companies prefer the advantages of their chosen protocol, but because they simply want to "be the platform." I can't imagine a better advantage than actually being able to talk with any of my friends on any other client.

If email hasn't proven a standard can be beneficial to everyone, I don't know what would.