Nice article on Green Bay Packers C Scott Wells by The Tennessean:

"Once you have tasted greatness and feel it, and you win a championship, that makes you want it more because you see how real it is, you see it is attainable," Wells said. 

"To be honest, this is the best offseason he’s had," said Granzow, who has worked out with Wells since his senior year at UT. "He could go play a game right now. Physically, where he is now compared to where he was last year, he is ahead of the game. The good thing is, Scott’s never satisfied. He has it figured out."

I spoke with him prior to the Super Bowl, and I was surprised how confident he was on his role as a starter. He was almost uncontested in training camp in 2010 after he was benched for the start of the 2009 season. He told me that his health was the reason he was starting, he had struggled with back injuries in the past, but it also appears that he's working harder than ever.

While you could mention some names as possible replacements, there is no obvious successor. It would seem that it's only a matter of time before his contract is extended to avoid his entry into free agency after 2011. He ranks somewhere in the middle for interior offensive lineman, but they don't need to have an elite talent at every position. A reliable, quality starter has a place too.