Starting recieving call after call after call from these guys today (Nov 6 07) in the morning.  Seemed to be a collection agency, although they didn't give a company name.  It was almost a threatening call as the guy asked if I had a sister named (name withheld), and I do.  Nothing more was asked of her.  After hanging up on him the first time, he called again within 10 seconds.  I didn't answer the next 2 calls, then the number changed to "Private Number".  Same guy.  Tried phoning me another 10 times