Facebook founder Mark Zuckerberg yesterday set off a wave of speculation by telling reporters that the social network has plans to launch something next week.

Some have speculated whether Zuckerberg might roll out the kind of music service GigaOm outlined in a story on June 19. The blog reported that Facebook was working on some kind of music feature that incorporated multiple music services, including Spotify, Europe's top streaming-music service.

Facebook and Spotify have indeed held discussions recently about integrating the music service into Facebook in a significant way once Spotify launches in the United States, multiple sources in the music industry told CNET. One source said that it appears the parties have reached an agreement but that could not be confirmed.

Angela Watts, a Spotify spokeswoman, told CNET: "We don't have any further comment on this since the last round of rumors." What Spotify said at the time GigaOm's story appeared was that the company doesn't comment on rumor and speculation but did include this bit: "we have a good relationship with Facebook in that we have an integration on Facebook Platform [in Europe] that has been valuable in terms of driving engagement with the Spotify service."