Not sure if those asking have seen this yet, but I just found the instruction on how to 'Send to SYNC' with Google Maps. Just took delivery of my new Milan last night, so learning more and more about what SYNC can do as I go here!
It's actually pretty easy to use. Search your route in Google Maps, then click the "Send" link. Click Car on the left of the popup, select the Make of your vehicle (Ford/Lincoln/Mercury) and enter your mobile phone number and click Send.
You can only send one destination at a time, if you send a second destination before downloading the first one in the car you lose the first one (I believe). Click the "Learn More" for the details on the system.