I had to step out for an errand, but now that the MacWorld keynote is over, I see the newest Apple iPhone firmware upgrade available via iTunes. I’ve got 1.1.3 downloading as we speak and the latest feature updates are shown to the right and of course, there’s a guided tour here.Part of the reason for the iPhone’s current and future success is the relative frequency and stability of the updates. Every other major handset manufacturer should be watching and learning from this. While many of the features are incremental changes, they’re hitting the devices every few months, not once every year or two. The mobile space is changing far too fast for long-term release cycles these days. Is the iPhone the “perfect” phone? No, not by a long shot for many folks, but when something needs fixing or improving, odds are that it will happen sooner rather than later.