Quick question.
Out of curiosity, are muscles already implemented into the rigging system, or is there a future plan (one that I can read, please 
) to code a muscle system into blender? Thanks for any response.
there was a developer who started coding a muscle system but,
I think hes been too busy to develop it much at allā¦
though I might be wrong as i havenāt really followed the development for a while.
anyways, heres the blender.org forum thread:
http://www.blender.org/forum/viewtopic.php?t=12457&highlight=muscle+sim+sys
there is a way to fake muscles with the new shrink wrap modifier:
http://wiki.blender.org/index.php/User:Jaguarandi/SummerOfCode2008/ShrinkwrapModifier
I like this method found here:
http://www.geneome.net/blender-tutorials/
Look under āAnimationā and then āFake Muscles (Armatures/Weight Painting/Shape Keys)ā
Hopefully this is of use to you as well 