Wirelessly posted (BlackBerry8700/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)
Were you at a corporate owned retail or premiere agent? A corporate store would be able to use the IMEI or SIM number to identify the owner and then they could contact them. If it is an agent location they may not be able to get the info. You can also call customer care and have them contact the owner, they may ask for info so the owner can then contact you!
If all that doesn't get it done I would say you now have a curve!