Not that they aren't already doing a pretty d*mn good job but these are more like suggestions:
- POP3/IMAP/Exchange access for starters; I would probably be willing to pay for something like that but oh well.
- To set defaults like expanded options (without having to click on “more options” and “show all”)
- A delete “hot key” (would have thought that would be the first thing they put in)
- Ability to synchronize with PDAs