Hi Simon,
From what you have said so far, I'm assuming that you have the early model B2 with the SD card that protrudes out of the side of the case.
There are two versions of software that run on the B2. The first version shows as 'B2 mmm dd yyyy' and this is probably what you are running on.
The later version shows as 'B2B mmm dd yyyy' and this will have the much improved Bluetooth capability as well as the Spotify functionality.
The age of your B2 does not matter at all; your B2 will run all of the latest features that the newer B2 does. All you need to do is to purchase the latest SD card from the Brennan on-line store. The card is pre-loaded with the 'B2B' version. I think that it is £10 inc P&P.
Alternatively, you can download the latest software at no charge and re-flash the SD card yourself but I'm guessing that you might not be too keen on the technicalities of doing this! If you do want to do it this way let us know and we can help.
Regards,
Peter.