I've always had trouble with figuring out the best methods in modelling for animation. PoopinmyMouth's little tutorial was a little confusing: http://www.poopinmymouth.com/process/tips/limb_deformations.gif Wouldn't the first example produce an awkward animation with the leg visibly cutting into itself? If you notice in…
Take a look at the .pdf swordmaster tutorials from http://www.xcloud.net/. The knee and elbow construction works really nicely. It's in Korean I think, but the pictures are enough.