I thought I'd share my small experimental project here: Geppetto is an Auto-Rigging Tool and Add-on for Blender. Currently, it supports only a default armature and it aligns and rigs your character model automatically. It is still a work in progress but here are some latest screenshots:
Find out more here at BlenderArtists thread:
I'm also doing a Pledgie Campaign here:
Let me know your feedback guys.