Jumpin' Jehosaphat! Just when you thought America's first 4G phone couldn't get any hotter, along comes this: a striking white version of the HTC EVO 4G (so much for that unavailable white iPhone 4, eh?). We've received confirmation that this here handset will be sold exclusively through Best Buy (as in, don't even bother heading to your local Sprint store), with the official launch date set for July 11th. We're told that Sprint will eventually gain access on August 8th, with other retailers snapping it up in September. If you somehow managed to hold off on snagging the existing bla