There are some reports of a Bluetooth iPod upgrading coming soon. Specs and release dates are obviously unknown, but iPod accessory manufacturers are said to be creating a plethora—that's right, a plethora—of wireless gear. Possible? Impossible? I'm giving this a high probability—you'll notice that Bluetooth is now standard on most Mac laptops and PCS—but it probably won't be a one-off release but as part of a larger, new iPod dealie.
Apple Completing Work on a Bluetooth iPod? [iPodObserver]