Is there a way to include podcast enclosures to the Global Post Feed?

My WPMU site is essentially a podcast network. I need a site wide feed that includes podcast enclosures. Before WP 3.0 I used a Site Wide Feed Plugin that is no longer supported. I'd like to use the Global Post Feed but the feed omits podcast enclosures making it useless. The site is http://beatmaven.com. Please help.

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