What EEman describes is similar to what I did with our cabinet. I created cut-outs behind the power amp and surround processor, and I have contemplated doing something similar behind the Blu-ray player since I am still hooking up my player via multichannel analog as well as HDMI.
in post # 13 there are some pictures as to what this cabinet looks like
http://www.avsforum.com/avs-vb/showthread.php?t=1173635 This is exactly what I am having built here localy. The open back in the first picture shows what it is I am dealing with. Stiff cables will be a problem. Drilling holes in the back panel is not what I prefer to do.