It can be quite funny on crowded Tube trains, platforms and escalators
sending business cards (not one's own) to random people whose phones are
permanently Bluetooth-discoverable. Given that they are underground, the
recipients always look very confused about how they could have received a
business card and then start to look around for clues as to where the
message came from.
How easy would it be to write a Java application for the T610 to constantly
search for Bluetooth-enabled phones in the vicinity and then automatically
send a certain business card to all phones that it finds? Then you could
leave your phone in your pocket while all these confused people around you
receive business cards.