I wish i noticed this in the beta trial. There are many minor changes than can be done to simplify & improve users response.

1.) Navi wheel was not taken advantage of. It would have made it more seamless to scroll through an inbox & message.

2.) Message reading; Very slow process. It seems to page down one line at a time per click. 3 lines would be more reasonable.

3.) Holding the D-pad in the inbox; Brings up a pop up tool, nice but poorly oriented(priority). The selection goes like this......
Delete - Last priority, Cancel key is available. Besides no one wants to accidentally hit delete.
Reply -
Reply all -
Forward -
Mark Read/Unread - For me, my first priority
Flag - Some may prefer Flag first
Move - Second to the list

4.) Message sent notification (but i suppose that is in the works).

5.) Move message from deleted.

6.) This one is for you Davis ;). Nice job on giving the specific inbox icon decal according to service provider. Unfortunately you missed out on the coherence.
I've said it before and ill say it again. Under "open applications" tab we understand the "@" symbol is for nokia messaging, but becomes confusing when a inbox is open
and they share the same "@" symbol. How about using the icon used for the inbox ;)

7.) At the moment this is what i can remember.....will return with few more.