Easily share photos with friends and family over Bluetooth. You can allow friends to save the photos to their device, or only allow them to view the photos. You can also send photos to up to three friends at once.
A simple little retro arcade game that allows you to take on your opponent over Bluetooth. It only features head-to-head multiplayer, however, so you won't be playing this one by yourself.
Finally! A peer to peer game that works with more than two people. Be the dealer, host a game, or join an existing one. Slide the cards across the table from one iPhone to another.
Blow some aircraft out of the sky. Full 3D dogfighting using the accelerometer for flight controls. Includes peer to peer Bluetooth support in addition to WiFi. Description does NOT say the peer to peer is compatible with original iPhone or original iPod Touch.
This iPhone incarnation of the classic Connect 4 game already supported multi-player games over WiFi, EDGE or 3G, but with the new 3.0 version you can also play games using only Bluetooth.
Challenge each other in a new game mode called Fish Jack. It's like blackjack with fish. You have to catch fish up to a certain weight without going over.