Blender Underground has been posting their experiences working through Tony Mullen's "Introducing Character Animation with Blender". Its an excellent read that starts here. In addition, recently a detailed Spring Rig tutorial has been posted there that came about while answering a question from the forums. Find it here.
Apollos wrote informing us of his tutorial and blogging series on Tony Mullen's book:
Over the last few months I've been blogging my way through Tony Mullen's
"Introducing Character Animation with Blender." I've been doing this, in part,
to help increase exposure for the book.
I just posted a lengthy bit on chapter 5 today, which was a fantastic chapter.
In the blog entries, I try to record my experiences, including difficulties
I've encountered and how I resolved them. It would be great to get others'
comments and insights about their experiences, or suggestions and corrections
on those things in the entries.
Make sure to thank Apollos for sharing his learning experiences and share your own thoughts and experiences. It looks like Apollos is up to Chapter 7 on his blog now. Check it out.