There hasn't been much talk about ex-Raiders CB Nnamdi Asomugha here. He's a free agent, and he's probably the best free agent available. The only reason he could be linked to the Packers is because he's friends with CB Charles Woodson, and Asomugha is in a similar free agent exile from Oakland that Woodson was in a few years back.
The big difference is that nearly everyone in the NFL thought Woodson was done as a cornerback in 2006 and he had no choice except the Packers. Asomugha's arguably the best CB in the NFL, and he'll have suitors to pick from.
But just to make sure there was no doubt, SI's Peter King shot down any Asomugha rumors. From SB Nation:
I'm not sure where some of these rumors come from but I agree with King. The Packers are already an elite team having won the 2011 Super Bowl and the prospects of adding a player who could command one of the richest contracts in the league doesn't make a lot of sense.
There's obviously a way to fit Asomugha in on the field, and turn the Packers secondary into a dangerous place to throw the football, but the financial commitment would put a lot of other re-signings at risk in the future.
Players like RG Josh Sitton and TE Jermichael Finley might need to be extended as soon as this summer, and LB Clay Matthews is probably in line for a massive extension in 2012. But that's all speculation because the free agency rules haven't been negotiated yet, and those three players might be under team control for an extra year beyond what I just wrote.