To be determined if the Giants added years or not. In a quote from Osi in the National Football Post, it sounds like he merely got a raise in 2012:
I’ll play out this contract, I’ll play this year and I’ll play my heart out.”
If it’s merely a raise for 2012 and he’ll still be a free agent in 2013, I don’t see where much changes, other than that he’ll show up to camp and stop complaining for what will still likely be his last year in NJ. But at this point, it’s probably useless to speculate until we get the hard details. I’ll have more when we know more.