Outlook Express sync with the Hotmail account.. So, maybe there's a way
to export the contacts once you get them over to OE, assuming this works?

1. Please first have the HotMail acct installed in your OE application.
2. Than open up Address Book> TOOLS> Press Synchronize Now.
3. This will move contacts from the Address Book's Main Contact folder
(not any contacts in sub-folders that you have created) to the HotMail
Address Book, and visa versa. You will need to check both address books
for duplicate entries, and delete as necessary.