Hello, I am also having problems with the 10.8.2 Audio/MIDI set up. It shows all my MIDI devices but one-an Akai Breath Controller, when showing the info window for it there is no box for putting it online.
It is in the MIDI window and hovering over the icon shows that the breath controller[ which is plugged into the audio/MIDI interface-an Edirol UA-25 which does show up as online] is conected to the Edirol by cables both ways.
I wrote to Roland and was sent new drivers for 10.6 and up and they work I think, because I an hear the VSTi I am controlling with the Akai, but Logic shows no input while playing the Akai through the EDirol.
The link is broken and a search on this site for How to combine multiple audio interfaces brings up nothing,and this problem of mine is all MIDI.
When I playback a project the MIDI all sounds fine so I think the problem is Apples Audio/MIDI set up not the Edirol interface.
mac late 2012 Mini 2.3 GHz Intel Core i5 8 GB 1333 MHz DDR3, M-Audio keystation 49, Akai EWI 4000s breath controller