According to this blog article dated Sept 2011: http://blog.stackoverflow.com/2011/09/creative-commons-data-dump-sep-11/
While we will always continue to produce Stack Exchange creative commons data dumps, we are moving to a quarterly schedule for all future dumps.
Clearbits, the recommended site to get the data dump torrents at http://www.clearbits.net/creators/146-stack-exchange-data-dump, lists the most recent dump as December 2011.
Is the plan still to provide quarterly data dumps?
If so, when will they resume?