British Eurosport are showing it, theoretically at least, every afternoon from 2.30 to 4.30. Unfortunately sometimes there are better sports for them to cover like tractor pulling from Holland or World Championship tiddlywinks from Helsinki! As far as I know they're not showing evening highlights as they do during Le Tour.
Of course, you can follow it live on
http://live.cyclingnews.com/ or follow the race radio bulletin on
http://www.gazzetta.it/Speciali/Girodit ... adiocorsa/