AvaStar, the Blender add-on for Second Life animation, has released a new update. The details are here: Avastar-2.0-alpha_3_blender-2-77. This is not a version for regular use. It requires that you use the Project Bento viewer to upload the animations made with it. You can upload to either the main or preview grids.
This release has a new avatar and the latest Project Bento skeleton. I suspect that there is a free updated skeleton somewhere. But, I have not yet gone looking for it.
There are some bugs in this version. Read the article at Machinimatrix for the details. Most of the problems have work-arounds.