A pair of non-disclosure agreements related to the potential purchase of the Atlanta Thrashers were signed and turned in over the weekend, according to the Atlanta Journal-Constitution's Chris Vivlamore. The signees are reportedly interested in acquiring the Hawks, Thrashers, and/or Philips Arena.
How do we know these are Atlantan shoppers, and not Canadian? Well, first, Philips Arena and the Hawks, though in the distant future there could be some sort of scenario in which a party could buy all three and then just sell off the stuff it doesn't want. More immediately, NHL bylaws require the team to exhaust potential local buyers before they can even begin to seek a relocation arrangement.
NDAs often just mean someone is trying to get a look at the books and has no real interest in conducting a transaction, but Vivlamore also reports as many as five such agreements have been signed over the past few weeks.
What this means in the most basic terms is that an interested buyer is looking at the Atlanta Spirit's financial records, but has promised not to share that information with anybody else. If they're comfortable with what they find and choose to proceed, the potential buyer will open up their own records as well.