The ATV 1 has a normal sized toslink (non-mini) output. USB won't output anything. Won't input anything either, unless you hack it.
The ATV 1 has analog, toslink, and HMDI outputs.
I don't own the ATV 2, so no comments from me.
The ATV 1 has analog, toslink, and HMDI outputs.
I don't own the ATV 2, so no comments from me.