In addition to features listed in Windows Live Mail moves to M9 Beta, Steve Kafka on his blog points to some more additonal features — “We added group support, search, sort, and a way to quickly narrow down your contacts by letter. But what probably has people more excited is that we added more ways to import contacts and the ability to export your contacts. Check out the options page where you can now import contacts in a number of different CSV file formats (including Yahoo! Mail and Gmail). You'll also see an option to export your contacts to a CSV file so you can add your WL Mail contacts to Outlook, your phone, or whatever you want. After all, they're your contacts.”

Kafka's Space Blog

Microsoft, Windows Live, Mail, M9