Well you can sync your contacts, not so sure about calendars though. www.seven.com is a PUSH email application that's installed on your phone. It's free of charge, and syncs contacts and other PIM information, as well as real-time PUSH. I find it extremely useful, but it kinda eats up my battery life, so I uninstalled it.
[[EDIT]]
"SEVEN is mobile messaging in sync with your life or business. Now you can manage email, contacts and calendar functions wherever you are - in the office or on the go. SEVEN also runs in real time, so you don't need to wait for messages to arrive. To help SEVEN manage your day, all you need is five minutes and one password."
-http://www.seven.com/products.html

So, yes I guess you are able to sync your contacts and calendar onto your Mogul.
Hope this helps!