Flutterby™! :

Dave Winer has discovered why reinventing protocols is a bad idea, he's running into problems with his content distribution system built on top of XML-RPC because his protocols don't take into account a lot of the issues that SMTP and NNTP deal with effectively. This wouldn't be noteworty except that this sort of arrogance pops up fairly frequently, developers slap together something without thinking through the ramifications and it ends up biting them. I'd have thought that Dave's been in the business long enough to know this, but he seems to be remarkably short-sighted.