Ghetto cooling duct here again.
Hard a go are re-flowing the solder on the USB hub that had about half the sockets not working and gave it a +5V power trace augmentation, but I think I may need to replace the sockets. Or wait until I have a reflow workstation (thank your element14 Father's Day specials). Also ran into problems with comms errors, decided I should measure the +5V at one of the miners, it was down to 4.90V at the miner, with 5.16V at the PSU, so I adjusted the PSU voltage up to 5.4V (5.06v at the same miner), and the comms errors stopped. Two more hubs on their way from DX.com for modification (along with some 3300uf 16V caps to repair an ATX PSU with a 45A 5V rail), though I may just get a 5V 30A supply instead, since the voltage can be adjusted up to compensate for ohmic losses.
Are you using
http://dx.com/p/42838 ? Mine just came today and it's not a bad little hub. I opened it up as much as I could without breaking anything and it looks like the power plug is through hole soldered so should not require a reflow machine to replace that crappy little socket with a wire.
The power plug is the same size as a dlink dhub8 and not 5.5x2.5 like I was hoping. My raspberry pi saw it just fine so I moved 4 erupters from a dlink along with the dlink power supply to it and they are mining away happily. I am not sure I would want to try to push 5 amps through that little plug so a hardwire might be in order if I keep using it.
I also picked up
http://dx.com/p/230094 on a whim and to my surprise it is NOT three x 4 port IC's but one "Terminus Technology Inc. FE 2.1 7-port Hub" cascaded to a "Terminus Technology Inc. 4-Port HUB".
The first one was the expected 3 x "Terminus Technology Inc. 4-Port HUB" configuration.
Finally, that 5v 5a supply referenced by several people earlier in this thread and listed in the OP arrived last week. It comes with a 5.5x2.5 plug plus an adapter to get it to 5.5xsomething smaller. I gotta admit, it doesn't look like a 5a supply. It is half the volume and weight of a UL rated 5v 4a supply. I don't think I am going to use it on anything and sure don't expect 5 amps out of it. Be careful out there if you running unattended equipment and stick to UL rated supplies. I am not saying that the unrated made in china supply that is half as big as it needs to be will catch fire and burn your house down but I wouldn't be surprised if it did.