Microsoft Research released…
Microsoft Outlook Mobile Manager 2.1
…this past October. The software is installed on the PC, not the mobile device. Here’s what it does for your mobile device though: Microsoft Outlook Mobile Manager (OMM) brings the power of Microsoft Outlook to your portable device. OMM can prioritize your 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.
Interestingly, it only works for Outlook email accounts that are either POP3 or Exchange Server based. It does not support IMAP4 email accounts. In fact, the POP3 support was only just introduced with this particular update.