If I understand correctly you have made the following connections:
SAT -> HDMI -> TV
BDP -> HDMI -> TV
HT -> HDMI -> TV
It appears you don't have SAT or BDP connected to your HT, so you will get no sound from those sources coming out of your HT speakers.
For your HT Receiver, since it only has one OPT IN, an optical cable will help you get sound out of one additional source - either BDP or SAT, but not both.
There is a way to get sound from both BDP and SAT coming though the HT, but it will not be true 5.1 surround - it will most likely be Dolby Pro Logic II generated by your HT receiver.
PS You don't need OPT cable for AnyNet+.a
#1: I am trying to set up HT-TZ322 with LN46B530 and Blu-Ray 1600 and Motorola 505 Sat box. After many attempts to get Any+net working, I see I need to have a digital optical audio cable. I was sold a Fiber Optic Audio Cable (Philips) but I suspect it isn't what I need. Phoned the Samsung support line but they don't have technicians there! I am hoping I'm at the right place for advice.
#2: I have all of the above connected via HDMI cables to the TV and am not getting TV/Sat sound from HT - will the optical cable resolve this problem? All advice appreciated, thanks.