PassAlong Networks launched Rostr, a customizable and interactive web playlist widget that enables artists, labels, fans and brands to extend their reach into social networks while offering users a unique tool for displaying their music tastes.

Rostr allows users to create and display a list of songs they want to exhibit on their social network profile page or on their blog. Visitors can listen to samples of the listed songs and then follow links to where they can purchase the showcased tracks. Users can customize the widget with a variety of colors and by allowing friends to rate and comment on their music selection, while visitors can easily click-through to create their own Rostr playlist widget or duplicate an existing widget.

In addition to Rostr, PassAlong recently launched a series of co-branded OnTour widgets featuring artists like Barenaked Ladies, Alicia Keys, Mario, Cassidy and others.

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