Keyspan, America's #1 brand of USB connectivity products, announced that its new USB infrared remote control includes support for Apple's groundbreaking AirPort Express. The Keyspan Express Remote is a convenient infrared remote that enables users to control media applications on a PC or Mac just as they control their TV or VCR. Retailing at $59 and shipping in mid-November, the Keyspan Express Remote will be available through the Apple store (www.apple.com), Apple's retail stores, as well as from CDW, PC Connection and other leading resellers of computer accessories.
USB Ir receiver to control AirPort Express (called AirMac Express in Japan) remotely without iTunes.
Alternative way to enable remote control without PC would be: to run HTTP server locally on Win32 / Mac OSX box which accepts control requests from PDA or some mobile devices, and dispatches the requests to local iTunes using COM API (Win32) or AppleScript (OSX). bdfoy's Apache::iTunes seems like one of the implementation that uses mod_perl handler with AppleScript (via Mac::Glue). New iTunes service DACP might help on this too.