"Sources close to the deal" are saying that a music-streaming service from Spotify integrated into Facebook is just a couple of weeks away, according to Forbes. Supposedly the service will be called either "Spotify on Facebook" or "Facebook Music," indicating tight assimilation and the icon will be given prominence among the others off to the left of the news feed on users' homepages.
Clicking on the service's icon "will install the service in the background", says Forbes, so the Facebook integration isn't so tight as to eliminate the need for a desktop client - something other music-streaming services, such as Grooveshark and Napster, offer. Like the current Spotify client, which integrates Facebook Connect, the Spotify-Facebook application will enable users to share songs with their friends
Pouring a little rain on the parade, Tech Crunch claims that its sources say no such deal is happening, as Spotify is still yet to secure deals with the record labels in the US before it can launch there itself, let alone in partnership with a third party. Tech Crunch's assertion is that without a foothold in the US, Spotify wouldn't even consider a deal with Facebook - despite Forbes' sources' indication that the US was simply being left out for now.
Rumours of a deal between Spotify and Facebook have been circulating for years now, so it's hard to tell whether the hour of such a partnership has now come. Facebook's user base outside the US is certainly large enough that Spotify's lack of availability there probably wouldn't be a deal breaker, but it's just as likely that the two companies would want to debut a collaborative service on Facebook's home turf.