Excerpt - With the 2008 Worldwide Developers Conference (WWDC) beginning next week, MacRumors provides this Rumor Roundup as a summary of major rumors circulating around the Mac Web before the big event (previous roundups: 2007, 2006). The 3G iPhone The 3G iPhone will be announced at WWDC 2008. There really can be no doubt. It's certainly been no secret that the iPhone will eventually adopt 3G technology. When Steve Jobs first introduced the iPhone in January 2007, he specifically said (video clip) that Apple plans on making "3G phones and all sorts of amazing things in the future". Fast forward...