How does backwards compatibility work from 3G down? Let's face it, 3G use will be limited for anyone who travels outside the best served areas (not to mention sucky coverage in hilly areas). Would it drop back to EDGE rates or not work at all (like it does now when EDGE is not available)? If it can drop back to EDGE, then a plus for the new model.
3G backs up to EDGE when 3G service is not available, so this is not an issue.