+1 Mike and utri007. We tend to shyt up threads a lot around here. It's good conversation and discussion, but it doesn't help the intent of the thread.
To answer the question about the clock port, my guess is these are not active clock ports to support an added device, but rather an interface for THIS device to be used on a clock port.
I am waffling on whether I want to use one on my desktop 4000 (which has USB AHI sound, wished THIS was AHI as well,) or on my 1200. Decisions decisions.