Two guys took it seriously: Over 43,000 miles so far; averaging about $17 a flight that would have cost over $10K apparently. They are getting some play on ABC, Twitter, Facebook, etc., and spending a few hours taking showers, sleeping on land, or having fun.
http://cosmos.bcst.yahoo.com/up/play...26720&src=news
"Thousands of Dollars of Flights for $600
ABC News - Tue Sep 29, 8:31 PM ET
Two guys take advantage of JetBlue's flat rate promotion."
... and they still have 8-9 days left...