The Fine Print
May 7, 2012
No bike share for most of part of Brooklyn until 2013. Via the relaunched Citi Bike website:
By August 2012, we expect to have 7,000 bikes and 420 stations available, with the rest of the system implemented in the spring of 2013, expanding to include parts of the Upper West and East Sides, and Park Slope, Prospect Heights and Crown Heights in Brooklyn.
As commenter Mike points out, Fort Greene and Williamsburg — and I’m assuming other areas of the borough close to the bridges — will be included in the early roll-out.
But the good news is that the operations center will be at the Brooklyn Navy Yard before moving to Sunset Park, according to first reports.
Brooklyn Spoke 
You mean “parts of Brooklyn.” It sounds like downtown, Fort Greene, Williamsburg are still rolling out this year.
Yes. Post updated. Damn Fort Greene and Williamsburg hipsters.
I can’t wait to see what the Daily News would write if a bike share truck ever got in a crash with a cyclists on Flushing Avenue’s very busy bike route next to the Navy Yard.
Some more details in DOT’s FAQ:
http://a841-tfpweb.nyc.gov/bikeshare/faq/#whats-the-system-going-to-be-like
Looks like the cutoff is Bergen Street.