Spotify’s new Play button brings millions of tracks beyond Facebook to the open web

Spotify continues to push the boundaries of streaming music. This morning it released the “Play” button, a widget that lets people embed songs from Spotify on any website. You need at least a free Spotify account to listen, which will no doubt help to grow the company’s user base. It also means there is now a simple, legal way to bring millions of music tracks to any site.

Spotify doubles its app library with a mix of blue chip partners and third party developers (sort of)

The number of Spotify apps jumped from 10 to 22 yesterday, with the launch of the company’s second wave of apps. There are more partnerships with big names music brands, as there was in the first ten apps. But there are also some playful apps created by third party developers (sort of) which show the direction that Spotify is headed in trying to expand into a full fledged music platform. Below is a nice summary from Ellis Hamburger:

Too lazy for Pandora? Songza’s music concierge will suggest the right tunes to match your mood

Back on March 5th, streaming music service Songza released a new feature on its web app called Concierge. “We found in studies that the main thing people disliked about Pandora and Spotify was having to work at discovering new music,” Elias Roman, co-founder and CEO, told me during a visit to the VentureBeat offices yesterday. “They end up listening to the same Bob Dylan playlist four times a day and it’s killing them inside.”

Grooveshark launches HTML5 mobile app to get around being banned in app stores

Grooveshark has been in legal hot water with the major music labels because it doesn’t have broad licensing agreements to play the majority of its music, unlike Spotify, MOG, Rdio and Rhapsody. Much like YouTube, Grooveshark depends on users to legally upload music that can be enjoyed by the community. If a user uploads a file that he or she doesn’t own and it gets a DMCA complaint, Grooveshark takes the file down.

Spotify brings the jams to Windows Phone 7

Spotify joins fellow on-demand streaming services Rdio and Rhapsody, which also offer Windows Phone 7 apps. While Spotify has captured the most headlines, it has lagged in the mobile space by not fully fleshing out its iOS and Android apps. It also recently launched an app for a limited number of BlackBerry models. But the Windows Phone 7 app looks like it may be the best mobile app for Spotify yet.