Nature writes about an EU-funded pilot programme to let people rent out PDA-based tourist guides with GPS to guide you to the right info.
This is something I keep telling people someone ought to do. Of course the GPS will only work outdoors and away from tall buildings so some may have problems. I suppose art galleries could put in some kind of “auxiliary positioning” system so the devices could know which painting you were stood in front of? Anyone heard of this kind of thing? Hmmm…
