The long-awaited day has arrived: In a few hours, Apple will (almost certainly) unveil version 2.0 of its groundbreaking iPhone. The Web has been awash with rumors about the all-new device, from the credible (it’ll be available very soon after the unveiling) to the suspect (it’ll include real GPS) to the ludicrous (Apple will dump AT&T as the iPhone’s exclusive provider in the U.S.). One thing that’s for sure is it’ll have 3G network technology, giving iPhone II a much faster connection to the Internet.

As for the rest, we await the official word from Apple boss Steve Jobs (he hits the stage at the Worldwide Developers Conference in San Francisco at 1 p.m. EDT). In the meantime, you might want to browse our comprehensive roundup of the potential new features of the Second Coming, then follow along with us, checking off what we got right and what we missed. T-minus 5 hours and counting…