This comes from the Forbes annual report on NHL franchise valuations, specifically the Nashville Predators section:

The rumor mill is buzzing that the owners are looking to sell the team, which has sizeable debt and has had a hard time attracting season ticket holders.

And here you thought HockeyBuzz had a monopoly on slinging around unsourced, sensational rumors.

While I wouldn't be surprised if minority members of the ownership group wanted to cash out their positions due to the current economic climate, there's been no public word of a potential sale of the franchise. I would challenge the folks at Forbes to actually do some reporting on this subject rather than cite "the rumor mill."