If you are using Exchange server (recommended), make sure you include the new Entourage 2008 Web Services Edition (a free update from Microsoft). This gives you tight integration of Entourage and Exchange Server. You can sync your Entourage tasks, email, contacts, and calendar to any Exchange-enabled device or service this way. This includes Windows Mobile phones, iPhones and iPads with a native app like IMExchange, Symbian S60 or Android with RoadSync (not yet tested here), and other apps. Let us know in the comments below what works for you.