Also, we're both wrong. If you subscribe to just the films, he died a full-bird Commander, set to take over for Riker. If you take the JJ Abrams comic-verse prequel to STAR TREK 2009:

 Quote:

The comic is set eight years after the film Star Trek Nemesis. Federation and Romulan tensions have generally subsided, with Spock the official Federation ambassador to the Romulans. Data is still alive and has become captain of the Enterprise-E after successfully imprinting his memories onto the prototype android B-4. Jean-Luc Picard is now Federation ambassador to Vulcan, Geordi La Forge has retired to develop his own ships, and Worf is a General in the Klingon Empire.


Data became a Captain.