Ruby on Rails goes 2.0 Riding Rails
At announcement time, I thought this more a personal milestone, but have since noticed that we'd marked Rails 1.1, and I think this belongs here. If nothing else, it explains where my time has gone lately, as the 2.0 version just promised to solve a number of problems, and indeed it has.

2.0 was long undersold as a consolidation release. It does indeed consolidate, but the renewed focus which that allows on other improvements is dramatic. Little things like proper JSON output mean much if you're not that good at generating your own patches to simple shortcomings. Plus, plugin writers were anticipating 2.0 in their code, so having that release out of the way makes it much better to use some plugins. And, there's lots of RESTful stuff, for your webservice2.0 pleasure.

Oh, they've already moved up to 2.02, with some substantive improvements on the .02 tag.