Looking at these pictures more closely:
    http://www.madshrimps.be/articles/SilverstoneLC17HTPCCaseReview-jmke-9195.jpg
                (note that key fans are covered up for the HTPC...)
    http://www.htpcnews.com/forums/uploads/post-6-1124517027.jpg

I'm wondering what sort of components I'll have...

    Main boxes:
        HTPC
        amp/receier
        PVR
        XBox 360

    Smaller boxes
        Wii
        audio mixer