As we reported when it launched earlier this year, Webdoc is a platform that allows user to quickly and easily assemble and share multimedia messages consisting or text, images, video and audio, as well as a range of widgets.

At the Dublin Web Summit, I met up with Webdoc CEO Stelio Tzonis, who gave us a brief demo of the service, and explained how brands are using it to engage with fans.

This week, Universal Music Group launched a Webdoc-based campaign on its Nirvana fan page on Facebook. The ability for fans to respond with their own multimedia messages meant gave them the chance to express their love for the legendary band in an interesting way.