The coolest (practical) gadget I’ve come across in the last few days is this wireless SD card that you can use to automatically sync pictures from your digital camera to your PC.
The brilliant thing about this card is that it will work in current hardware without having to update anything. The wifi adapter and firmware are built in to the SD card allowing it to connect to wireless networks when your camera is on to sync photos to your computer and straight on to photo sharing sites.
My digital camera happens to require a special cable to connect it to the pc (why not just use standard connectors!!) so this would save a load of time and the need for carrying around a cable or a card reader. Only problem is at this moment in time I can’t find anyone selling them.