Last year, the issue came up again. Larry Zhu, the lead Kerberos developer from Microsoft wanted to put together some way to accomplish some of the same goals I was talking about in 2004. I told him I'd tried to go down that path and found it too complicated; I sent him my old document so he could see what I ran into. He wrote back and said he really liked what I had written and wanted to work on finishing it. I was dubious that I would like the result.
Now, having reviewed what he's doing and having spent a lot of energy working on the proposal, I think he did find a way around my problems. I'm very excited about what we're doing. Also, working with Larry is a lot of fun. This is more enjoyable because it is creating new technical work. So much of what I do in the IETF is review others' work. It is pleasurable to be working on something of my own from time to time.