More pics: http://imgur.com/a/U8Nds
I'm not a fine craftsman but I'm fairly satisfied with this. Despite appearances I don't necessarily intend to turn the Pi into a game console - I just wanted a neat case with rear cable entries, and an old Atari Flashback 2 case seemed like a good choice.
I wanted to avoid too much fiddly soldering and termination, so it's pretty much all made with modified, pre-manufactured cables. I've stripped the sheaths from the HDMI and network cables to make them easier to route. Yes, that's blue-tack around the edges ^_^ but the black goop holding the USB hub in place is Sugru.
Power comes in from the rear plug, through the Atari power switch to the USB hub, where it taps off to power the board directly. Then of course the Pi USB runs back to the hub, which provides my two external ports. That leaves three internal ports, which will be ideal if I want to add little wifi/BT adapters etc.