Here is the updated news from Cowboys practice today:

• Romo's puncture has been described as "small" and multiple sources have indicated it could clear up in a couple of days. [ESPN] (I'm not buying that)
• Derrick Dockery has a sprained MCL and did not practice [Calvin Watkins]
• Terrance Newman, Costa, Dez Bryant, Scandrick (ankle out 2 more weeks), and Miles Austin did not practice. Miles Austin is expected to miss at least 2 weeks. 

With Dockery out, that means the guy he replaced, Bill Nagy, the Cowboys last pick in the 2011 draft, is back in at Guard. Via Rotoworld:

A seventh-round rookie, Nagy drew the start in Week 1 against the Jets and graded out as ProFootballFocus' worst run-blocking guard. (Nagy suffered a neck injury, which is why he was out last week).