While neither CB Nathan Vasher or CB Karl Paymah are great players, they are both were both spot starters last season and the Bears and Vikings are going to have to find replacements for them. We talked about the release of Vasher here, and over at Niners Nation, they think Paymah will provide depth but he isn't expected to start.
The Bears have already moved on and signed CB Tim Jennings before they released Vasher. Jennings played primarily in the nickel package last season for the Colts, but it's not expected that Colts fans will miss him.
For the Vikings, letting Paymah go is maybe just a sign that they intend to give rookie CB Asher Allen more playing time in 2010.