Per his twitter account, he's having left ankle surgery today. This will hopefully allow him to stay on the field in 2012 and put the injury behind him. Pouncey played in 14 games in 2011 but missed weeks 15 & 16, then came back against Cleveland and reaggravated his ankle and ended up missing the wildcard game in Denver.
The future of the Steelers line depends in no small part to Pouncey being on the field consistently.
From BRC's DROID X of Awesomeness