Just received a call myself. Same thing that happened to Jon happened to me. I waited to see what would happen. Something about a credit card offer/problem. Hung up after that.
Same as Jon & Zach...when it started ringing, I hung up. Grrrr!!! This is so annoying..at my work number too. For this reason i disconnected the home phone..sick to death of all these pesky unwanted calls...phone assaults!