18 months or so ago I bought a compact flash GPS device, for about £40 which quickly transformed an old dell PDA I had into a portable satnav device.
Today I saw this on Photojojo – the Eye-Fi Wireless memory card adds Wi-Fi to any camera that uses SD memory. It’s orange. It looks like a normal SD camera memory card. It holds 2 GB of photos. And it wirelessly uploads your photos to your computer and to Flickr or one of 16 other photo sharing sites
Check here for details