I have used blender for a while to make sculpts and always found it a little annoying how limiting it was as far as the detail in the shape goes, so it will probably be like a very high detailed prim, though I am concerned about customers retexturing as I know a lot of people like to customize. What I don't know how to do yet is the ave mesh itself, but I am sure I can learn. Just hope they don't limit this to premium accounts only, everyone should take a stab at it.
Of course, LL still has to get it working, and people have to be on a type of 2.0+ viewer to see it I think, so.....it could be a while.
I wonder if you will be able to stretch the ave mesh out, that would eliminate the need for those buggy deform animations that I see so many using.