Wind is now offering a way to import your contacts when you port your number over. It looks like existing users can use it to import contacts from other mail clients to their Wind Phones.
http://safeport.windmobile.ca/backup/web/* 1. Register for a no-charge trial account.
* 2. Import contacts from your existing Yahoo!® Mail, Gmail™, Windows Live Hotmail™, Microsoft® Outlook® and Facebook®.
* 3. Manage your contacts on a simple Web screen - add, edit, delete and merge contacts so they are just how you want them.
* 4. Copy your contacts to your new WIND mobile phone.