Reddit post, please comment there
http://www.reddit.com/r/Bitcoin/comments/2rru9h/how_to_measure_the_decentralization_of_bitcoin/
There is a thread for upvote requests here:
https://bitsharestalk.org/index.php?topic=9174.0
This post is on the hacker news front page: https://news.ycombinator.com/item?id=8858588