A couple of us from Plaxo went to Dojo Developer Day #2 (or 3D2, as the locals called it) this past weekend, hosted at AOL's mountain view campus. We've been making extensive use of Dojo in some of our new soon-to-be-released web development, and it's been really valuable.
If you haven't heard of dojo, it's a major open-source project to build high-quality reusable JavaScript code that solves many of the common problems you face when building an Ajax app (working across browsers, separating your code into modules, making API calls, etc.) and also empowers you to build cooler apps fastert (animation, drag-n-drop, widgets, etc.).
In addition to the general discussion about the future of dojo, highlights for us included chatting with the lfx-animation authors (which we've been really stressing in some of our work), Alex Russell's talk about improving performance (something we're focused heavily on right now), and some cool dojo-enabled show-and-tell projects, including a sweet real-estate search site that makes me want to buy a house in Colorado. :)
It's great to see the energy and sense of community behind Dojo, and we're glad to be along for the ride!