Transfer with bluetooth? Please explain more! Maybe i'm missing something but what about internet and blockchain connection? Bluetooth is not connected to the internet am i right?

You can't do a 'Send Digibytes' using Bluetooth, but
you can make a transfer via Bluetooth when you 'Request Digibytes', which I'm assuming is the first building block for merchant customer charging. You first choose 'Request Digibytes', enter the requested amount, then select the checkbox for 'Accept payment via Bluetooth for more reliable processing', and, finally, the person making the payment to you scans the QR code, and, voilá, the coins are sent!
Wallet feedback is not highly developed however as there is nothing that overtly indicates a Bluetooth transfer has taken place. You can infer that it has happened nonetheless since the transaction is instantaneous but unconfirmed until included in the next block to be created in the blockchain . . . at least this is how I deduce things.
What you said about the theoretical basis of any DGB transaction is correct though -
it has to be part of a block within the blockchain - and since a direct device-to-device Bluetooth transaction circumvents that fundamental requirement, it must be assumed that the Bluetooth transaction is basically cosmetic and somewhat illusory, and really doesn't exist until finally included in the next block created in the blockchain; this assumption is basically confirmed by the empirical data gathered from actually going through and monitoring the process.
DibiByte, et al., please correct me if I've got something wrong here. Also, I'd love to be able to change languages since I'd like to be able to post screenshots that everyone can understand. Thanks.