In the past month (Oct 2007)I have received several missed calls on my cel phone from this 302-405-1102 number & no voice mail msg was left. Finally, I answered the call & no voice recording, fax dial tone or human responded to my hello & the call dropped/disconnected.
I believe the scammers are hoping you call back the # so that your phone will be charge a fee for the call to them (like a 900#). This is what happened to my friend.
I have received calls from this number as well (I have 917 area code). I did in fact call the number back and heard a recording that said "This number is not in use." I also receive a few of these a day. Annoying!