Sony Ericsson to announce a mysterious music-oriented device on 21 September?

We still have absolutely no idea what is about to be announced the coming Monday. We guess this will be a new music-oriented handset or accessory that will pack quite a few functions. Still, we won´t be stunned to find out all the fuss is about some sort of new company service relating to music, say a huge online store dedicated to audio that offers free tracks or something like that. So, what do you think? Sound off your opinion in the comment below.
source: Sony Ericsson via GSM Helpdesk