I already have the tools and the desire to model this and a few other things myself (being in school for animation helps). The problem is that the motion capture studio runs for about $200/day. Then you have to pay for actors, meals for actors, and then donate the time it takes to model the data properly. I don't think you can do this with freeware, not even the vaunted Blender.
EDIT: Just to help move you along, if you wish. This is a sample of what is involved. The freeware BVH stuff will work, but you won't get what you are asking for without scripting it yourself. I think it would probably take a month worth of work, which at current prices for rentals, actors, and so on would cost around $10,000.
http://www.cgarena.com/forum/viewtopic.php?p=52789Still think HTC should foot that?