I saw this article today. Very interesting about the FireWire bus in the Mac mini. This could mean a new twist in the future of the Mac mini or a feature that wipe away from original design. Other boards have known to have extra slots or unused features so this could just be a sign that Mac is reusing a design of other boards to help production of the mini. Even though the article basically states what I think and have just said I put it in so you can read it.

"So the same dude who overclocked his Mac mini continued to tinker, and has uncovered an unused FireWire bus in the Ultra ATA-100 riser card that connects the mini's optical drive to the motherboard. What's up with this vestigial FireWire connector? Leo thinks the riser was designed to feed an iPod Dock connector built in to the top cover of the mini. Whether the feature was originally built in and then dropped, or whether this foretells the advent of an iPod Dock-enabled Mac mini (or whether this is all pure shinola, for that matter), is unknown. Although, considering that nary a single iPod now ships with a Dock as a standard accessory, it wouldn't surprise us to see the next Mac mini revision sporting just such a convenience. And wouldn't it make a great holster for a video iPod ?" [via engadget]