I am missing Pst Mail Application. It is a simple app that will bring Outlook offline folders to your mobile, making their email messages immediately available.With the advanced search option, you may easily locate messages by looking in its sender, recipients, subject attachment file name or message body. Results may also be restricted to a date range and optionally include results from subfolders.Reply and Forward messages

it would a very interesting application to be developed for Nokia N900 where carrying a laptop to view archive mail would not be necessary any more.