Hey! So here is a python plugin that just simplifies creating a stretchy IK arm/leg setup.
You can download it HERE
This video is a basic demo of how it works... I know the text is ridiculously small and it was stupid that I even recorded it... sorry :) I've attached an image so you can see the attributes that I'm talking about. There is also a readme.txt file in the zip.
Also, on a side note, I've named things elbow and upper_arm, but you can just rename that to upper_leg and knee for a leg setup.
It's not super tight in terms of being packaged as an easy to use tool, so hit me up if you have any problems.
On one more side note... my voice really cant be that nasally... that has to be compression!!! :)
Here's a sticky post of my reel - look in the previous posts for the full posting: Rigging Reel