Apple's iPhone 2.1 update has been under early testing by MacNN and Electronista staff on iPhone 3G units, and at this stage appears to be a definite upgrade over the 2.0.x releases. The software's defining trait isn't a new feature but rather its speed. Where 2.0 was frequently choppy while entering text or even just in some transitions, 2.1 appears to be seamless and smooth -- that is, what Ap
