Here are two other bloggers/perspectives from my critique group, who also took the Voice Workshop, and “reported” about it on their blogs:
From Rose Green: http://rose-green.blogspot.com/2011/03/voice-workshop-part-1.html
From Jaclyn McMahon: http://dramaquill.wordpress.com/author/dramaquill/
Author Sandy Carlson 
Great posts on voice. I think picking Junie B. Jones was a great choice for the exercise. She has a distinctive voice. I’ve been trying to study the voices of characters more too.