@Ed... your feed works great on my Multi-feed. I have my YouTube subscriptions in one column, The Verge, Yahoo News and Engadget in others. All sat hidden on my site and I open it to view when I hear the Update audio. Each individual users settings are saved via a browser cookie.

@Burgs: Great! My issue with using your plugin, as I understand it, is that I want to display the multifeed in a widget that can be used on a group page. Sounds like your plugin is linked to the user account. In my case, each group may want to create one or more multifeeds that are publicly visible on the group pages.