There used to be a Feedback link on the main page or under support but I cannot find it anymore.
However, go to
http://www.apple.com/feedback/ then select your model of iPod and fill out the feedback form.
To make sure Apple sees podcast sorting on the iPod as a hot item their
customers want, I suggest everyone use the subject of "Podcast Sorting Option on the iPod". This should go without saying, but, be sure to state exactly the feature you want and why in the comments section of the form and leave out the "your a bunch of idiots" message.
I would think Apple pays attention to the feedback form but then again they may only have one monkey manning the feedback "mailbox".
I seriously doubt Apple has staff to read the forums or is willing to pay anyone to provide support via the forums, which is rather a shame.
Message was edited by: Phobos Damnameneus