I agree with almost all the suggestions for improvements but, let's face it, there's no "show stopping" bug that makes an update vital - the system seems remarkably stable and bug free. It may not do everything we'd like it to, but what it does do, it does very well. Because of that, I guess there's not really much pressure on Sony to rush out an update.
The "Connect" software is a different story - I really hope we get an upgrade to that ASAP. It's just awful.