I have been using emoze lately to get access to my work email on my mobile phone through Outlook Web Access. You configure it on the device and then the email gets pushed to your phone. It works nicely, but unfortunately the actual email interface is the standard messaging app (though slightly improved with configurable font sizes).
Ideally speaking, Nokia Messaging would also support OWA email besides gmail, yahoo and the like.
This would allow work email access for a reasonable cost with minimal configuration from the work's IT department.