First, my apologies for time away from the blog and from Second Life. It's nice to be back.
Now for the important stuff. There is an alpha version of the mesh deformer code, and there are SL clients that include that code, for example Niran's Viewer v1.03. There are still some open issues, and like any alpha code, it needs to be exercised, so I hope you'll try it out.
For information, check out not only SH-2374, but also STORM-1716.... and this video.
UPDATE: I hope that the mesh deformer changes will have consequences for SL's busty community; the video looks very promising. Time to experiment.