http://ozreport.com/14.112#0

http://www.xcmag.com/2010/05/european-paragliding-championships-switch-on/

Two stories. One that they work well (and I got to see how cool the tracking was
when I watched live tracking during the Paragliding European Championships). And one that they don't work well when it comes to producing a track log for scoring purposes (without pilots having to download
a track log either themselves or at the score keepers).