WHS Add-In: WebGuide Stream media over the web from WHS
WHS Add-In: WebGuide for WHS FREE
From mswhs.com: WebGuide for WHS is out as a free add-in that enables you to remotely access, listen, watch and stream your music, photos and videos stored on your home server while away from home.
I was just talking to my Brother-in-law last night about hoping this would be a feature added to WHS.