Fascinating: GPS satellites are both high enough, and travelling fast enough, that you need to correct for relativistic effects in order for them to be effective.

"Trails is the first GPS iPhone app that allows you to record, import and export tracks onto your iPhone." Also, it's not *too* battery intensive, has a really well thought-out UI, and wasn't too expensive. Very nice.

And it just worked first time. Awesome!

Welcome to GPSTagr. Our service allows you to geotag your flickr photos using a track file from a GPS device in 3 easy steps.

"This project installs menu items into the Adobe Lightroom interface that allows photos to be tagged with geographic information through the Lightroom interface."

GPS for cycling with time-attack and training modes; lets you race against yourself (or virtual competitors) over time, and track progress on the PC-based training application.

"DHL confirmed to the Telegraph that the artwork was an 'entirely fictional project'." As suspsected. Enthusiastic as I was, I wasn't sure GPS would penetrate that case. Oh well. It's a shame it was presented so realistically; feels a bit cheap.

Self-portrait sketched out in GPS traces across the globe. Or at least, across one particular projection of the globe. I'm just pleased to know things like this work.

"Literature is inescapably intertwined with our everyday environment. By making this visible, we can encourage and spread it, and send it in new and exciting directions."

"persistent play, GPS telemetry, live sharks". Oh boy. That's phenomenal.