Vista - IM address and WLM?

So, I put some friends' Windows Live ID e-mail addresses in the IM address
field in Outlook 2007 then imported all of my contacts into Windows Live
Hotmail (because I can't get Outlook Connector to automatically sync...it
just says Contact: Connecting, but that's a well documented problem here).

My question is this:
Why don't any of these contacts show at the top of my contact list in WLM
(to indicate that it recognizes their Windows Live ID)? I can manually add
them by right-clicking and selecting Edit Contact, but shouldn't WLM already
know the WL ID?

Thanks,
Adam