You would still need individual cell phone numbers to send it, though, right?
No, that's the beauty of it. When the Bluetooth on your phone is turned on, it will search for other Bluetooth devices. What usually happens is you'll pick up different phones, eg 'Nokia3600' or 'Samsung10' (i've made those up, lol). Or sometimes, 'Sexy Sue' (people sometimes 'name' their phones - I've called mine 'MidwichCuckoo', so that name would be visble for anyone searching for a Bluetooth device within range of my phone - but they wouldn't know it's ''me''). Am I making sense?