Filed under: iPhoneIf you were about to buy one of the MyRegions Navigon GPS apps for the iPhone, don't press that 'buy' button just yet. In honor of WWDC, Navigon will make the normally U.S. $29.99 version just $14.99 from June 1 through June 11. That's a big savings on one of the premier nav apps. The MyRegions versions cover the Western, Central and Eastern U.S., so if you are going to buy, make sure you get the correct versi