Just out of interest George, can you explain exactly what you mean by the first bit? I am assuming you want to be positioned at the newest message every time? Genuinely interested to know why you consider that better than the current interface...
I deal with a few dozen emails per day, at least.
I will frequently mark as unread, or mark for followup messages that I will have to deal with later in the day, or even days later, or messages that I will have to talk about again for a long while.
So, no, I would not necessarily want to be positioned at the newest mail every time. I might want to be positioned at the oldest mail marked for followup, or the oldest mail that has been left marked unread.
With Outlook and many other mail interfaces, you can choose a view that will show you either all messages that were marked for followup, or all messages that you've left as unread.
Without a setting like this, it becomes tiresome having to scroll through a 200-mail view window to find a mail that is waiting to be dealt with.
This will, of course, cause some people to regard the iPad as less excellent than its potential, and cause them to carry a notebook instead of the iPad.
I've also missed being able to do this on the iPhone 4. :-(
I know that Apple are aware that some people would want to do this, because the online management of their iMAP MobileMe system allows for these settings. But of course we can't use the online interface for MobileMe on the iPad because if you navigate to MobileMe you get a window instruction you to install the applications or use the native mail application.