Thank you for this excellent discussion.
Very few people in the lively sectors of nosql and cloud computing have the ability to distill both popular concepts and misconceptions this plainly.
Now, when will we see those fast_ip invites?
http://twitter.com/b6n/status/11877355945463808
http://www.youtube.com/watch?v=Nnzw_i4YmKk
Foursquare harnesses the ubiquity of Twitter, Groupon, and Yelp with practically zero benefits in return for its usage.
I really don't get it, either.
http://en.wikipedia.org/wiki/Michael_Brook