Johann showed some very cool hardware from GeoTate that will automate the geotagging of photos via small GPS devices in cameras...they fit in phones, watches, credit cards and other small stuff too.  They have some simple hardware components for hardware manufacturers to embed in their  solutions.  Definitely keep an eye on these guys...this is going places.  Johann predicts that with GPS enabled cameras, geotagging in Flickr can grow from the current 6.5 million manually geotagged photos to over 50 million automatically geotagged photos...that's huge!!!