There are tons of ways to go about this...
You can put the contacts into something like gmail or outlook.
There are also many free applications that can backup your data and make this transfer!
If your Winmo phone is still active you can download the m:IQ app and that will backup your whole phone, contacts, calender, texts ect. to an online private account. Then when you get the new X (Sweet!) you can just download m:IQ on that phone and all your data will automatically load on! Pretty cool!
Hope that helps and gives another option! Enjoy the Droid!