We have, however, created a solution: you can download a file containing a plug-in (Mac)/registry entries (Windows) that remap the channel keys.  That is, you give up using Cmd-~ to switch among open documents, and you lose Cmd-1 for zooming to 100%, but tilde will go back to selecting the composite channel and 1, 2, 3, etc. will go back to selecting/targeting the first, second, third, etc. channels.  The Mac plug-in just needs to be dropped into your Photoshop plug-ins directory, and on Windows you can enable/disable the behavior by double-clicking the reg entries.