Headphone crossfeed

This is really more of a suggestion. I don't see an Apple "suggestion box," with their various layers of help, so I'm posting it here.

It might be nice for the Ipods to have an optional crossfeed which would reduce the separation of the channels for a more natural sound with headphones. They usually have rollof at the high end.

Here's an example:
http://www.linkwitzlab.com/reference_earphones.htm

Also Headroom and some other headphone amps do this.

It should be easy to implement.

I'm curious if anyone thinks they might ever do this or knows how to submit suggestions to Apple.