OP, if your TV doesn't output 5.1 surround sound, you're only going to get stereo sound from the TV's output. Not that many TVs output 5.1 audio over their audio outputs.
Your HTiB has two optical inputs, which means you'll be hooking the HD cable box audio to the HTiB via an optical cable, and the right cable would depend on what the output of the cable box is. The other optical input would go from either the 360 or the PS3, and if you wanted to hook up both, you'd need an optical switcher to put more than one device to one input.
The Wii's audio would go on the AUX jack on the back of the HTiB, since there's only RCA connections coming off of the Wii.
Run all the video connections to the TV, HDMI from the HTiB to the TV, component from the Wii to the TV and HDMI or component from the HD cable box to the TV.
The PS3 or 360 would go via HDMI or component, depending on the number of inputs you have to work with.
Posting the model number of the TV would be helpful, so we know what to work with for inputs and outputs.
[quote name='DV8']according to your specs your bluray has 1 hdmi in? If it doesn't then you can run optical audio from your cable box to your theater. Your TV should have an audio out on it too. Try it and let us know if anything goes wrong.
edit: so I did read it wrong, your theater doesn't have any HDMI inputs. Run your audio from your TV to your theater and all your problems should be solved. If you need to pick up some cables, I can't recommend monoprice (their site got hacked and my info got stolen) but look around the web for cheap cables.[/QUOTE]Monoprice has long since fixed that issue and I've ordered from them since then without any issue. I also had the same issue and understand that issues happen with web vendors.
I'd continue to recommend them even with that issue that happened. Without question.