Younger people who may not know: Tim Bray was one of the creators of XML. Also a nice guy on Twitter (at least he was a few years ago) he's probably active here too.
[Edited - added Tim's name to help future searchers]
His blog posts are one of the main things that keep me coming back here. Insightful, and he often is able to put into words things about the industry that I can only feel in the periphery of my heart.