Again, most service ports can be used for that purpose but not all.
My point is, should we drop RS232 altogether and move towards RJ45 ?
I think there are many high(er)-end devices that use RS232, a lot of them have that port specifically with systems integration in mind. Among those are quite a few excellent amplifiers, for example, which have great sound but may be five or more years old. It would be a shame to stop supporting these.
It is, of course, nice to know that LinuxMCE is moving along with newer technologies (as Posde already wrote above)!
My 2 eurocents,