TheFly, if something like this "internet number" does come along, it'll just be yet another thing. I doubt there's ever going to be a "standard" for someone's online details. People will always use this and that. Something interesting though, that Wegcash released recently was that AWMM program. I like the fact that it's industry related only.
But i haven't actually used it yet.
http://www.awmm.com
I'm very interested to see what Adult Centro is all about though.