Yes, and I made it myself.
http://www.gp32x.com/board/index.php?showtopic=34309#Really busy (school/painting my room, changing flooring/building a mini-itx Tualatin and trying for
Beryl 1.4 and
AIGLX) and strapped for cash, otherwise I might be trying my hand at making a printed circuit board for the e810 serial cable that supports USB and TV-Out. A possibility would be a Sony/Panasonic style camcorder 3.5mm A/V port (looks like headphones plug) in the shell so it wouldn't be in the way if all you needed is USB.
It could accommodate Serial and Jtag too, but Jtag should really be a different adapter because it is rarely if ever needed, and if you do need it, you know who you are.
As far as the people who "want a stand", "needs to look pretty". A stand is a stand, it doesn't need to be integrated into the connector, or an expensive, unwieldy multi-function box.
It can and should allow the connector to do its job and should hold the GP2X securely, but it can be made in many different ways, and for much less money and more intelligently than GPH is capable or perhaps willing to do.