audiophiles.... gotta love them.
Okay, OP, what exactly is your issue/problem here? No standard 3.5mm/RCA output? And you need
this feature rather than optical/HDMI to output audio over your receiver's Zone 2? Correct?
If so, I'm sorry I can't provide an answer better than what's been given (optical->rca conversion box), but those should suit you well.
I agree that it's a shame they couldn't incorporate the 3.5mm jack (or standard analog audio out), but the fact is they didn't. Now it's on the consumer to find a work around.
I'm using my appletv solely for streaming music, but luckily I don't have the same requirements you do. I'll just be streaming into the living room setup so my wife, kid, and dogs can rock out without having to blast my imac setup in the office.
If you find a resolution to the problem - that doesn't require excess expenditure like the options already presented to you - please come back and update this thread as others who are in your shoes would like to know, I'm sure.
Good luck!