FWIW I too have this problem, only mine is with the mains cables mostly. I have eleven, going on twelve, Cyrus units, plus a turntable, all needing "plugging in". You used to be able to buy miniture (sp) mains strips at Currys and the like, where you could take off the bulky 13-amp plugs and use little ones plugged into a strip that had a pukka power cable and 13-amp plug on the end. These seem to have diaspapeared from the shops, however, so I'm actually toying with the idea of buying a domestic house fusebox and wiring that up on the back of my rack instead. Although it's a mess at the moment, I usually cable tie all the power cables together down one side of the rack, behind a leg or whatever, to keep them as far out of the way as possible, and route everything else as neatly as I can.
To interconnect the boxes themselves, I use Chord Chameleon Silver Plus interconnects mostly, and digging around on Fleabay I found I could buy these in half-metre, rather than full-metre lengths. This help a lot, and I'm sure that since most of the impedance is actually in the plugs and sockets not the cables in between, audio performance hasn't changed a jot.
Speaker cables remain a PITA, especially as I have paired (bulky) Chord Odyssey 4's in matched lengths running to each speaker. I coil up the spare lengths to the near speaker and hide them behind a pot plant.
Oh yeah, and the Cyrus AV8 is going to get moved to sit next to the DVD player on the TV stand and I'll be running "cheap" cables from it to the pre-amp and to wire it into the control bus loop in the near future.
Unless or until someone comes up with an all-digital bus-like interface, or we turn our backs on the multi-box setups of choice, I guess we're all going to face this problem. When (yeah, right) I win the lottery and have my own house built, I'm going to have a little room off the living room where I can hide everything and just have the minimum number of units "poking through" the wall.
Finally, have you ever noticed on the TV commercials that those TVs on the walls never have any leads running to or from them, no satellite receivers, DVD players.... Same reason you never see a TV in a showhouse living room.