So that right there says iPhone 5 in February / March 2012
That would be nasty cool, but I don't think the next one will be out before the new all-in-one chips are available, so it might actually be as late as Oct 2012. iOS 5.3 could be out in the spring and offer some new candy to chew on for the remaining time.
And there's not going to be an iPhone 5. No point calling the sixth iPhone a five. iPhone LTE is far from a good name, but I'm afraid that's what we'll get.