Of course most of jailbreaker may have installed this very important tweak. Celeste is a tweak available in Cydia store which brings Bluetooth integration to iOS that Apple has forgot. Celeste actually allows you to send music files, photos, contacts, memos, iFile, Dropbox and more to any other device including Nokia and BlackBerry. Celeste 1.1 is now available with some small changes.
Celeste 1.1 Updates :
*Full iOS 4.3+ compatibility: “Send” ActionMenu in iPod.app now supported
*File transfers continue when device gets locked or enters sleep mode.
*Songs (mp3s) without metadata are added to iPod.app with their filename as title – no more title-less songs
You can get Celeste right now from Cydia Store under ModMyi repository for $9.99
iNews 
Celeste Receives Update With iOS 4.3 Support, Sends Directly From iPod App