Here is the recent news for the latter half of March.
Felix Geisendorfer, an early Node.js contributor, has released a collection of guides for developing using Node. This is a work-in-progress, but has a lot of good gems: Node Guide.
The jQuery teams has released a new version 1.5.2. This is the second minor release to squash a few bug.
The MooTools teams adds localization API for their source code. This means that you will be able to download and use the Core and More frameworks in your native language.
The article, A Recipe for a YUI 3 Application, on the YUI blog does a great job explaining how to build YUI 3 applications, using small re-usable modules. Pay special attention to events, as it covers how to publish events between YUI 3 sandbox instances.