Microsoft Outlook Mobile Manager (OMM) version 2.1 by Microsoft research is a free tool for Microsoft Outlook 2003 that can prioritize your email messages and makes smart decisions about when to send email. OMM also sends calendar reminders, task reminders, and an Outlook Today style daily summary all to your wireless device.
OMM requires an Outlook client used with either a POP3 or an Exchange email account.

Features include:

E-Mail Triage: Intelligent Message Prioritization
Employing technology developed at Microsoft Research, OMM learns about the urgency of your email messages, and prioritizes them for relay to a mobile device. Intelligent decisions are be made about if and when to notify you. Only time-critical messages are sent to your mobile device.

Works with Your Lifestyle
OMM knows how you work and when you work, and only notifies you when it is needed. Based on hours of the day, days of the week, and by detecting your presence at your desk–or in your inbox from other sites, you can control the amount of notifications you receive.

Daily Summaries
By integrating with the Outlook calendar, OMM will send you a summary of the days events

Reminders Just When You Need Them
If you are not at your desktop to see a reminder from Outlook about a task or upcoming meeting, you can receive the reminder on your mobile device.

IntelliShrink (?) Message Formatting
OMM employs IntelliShrink (?), a flexible message formatting technology that can custom-tailor information to devices with limited screen sizes and resolution.

Download here