If your interested in incorporating all or some of the new cool Windows Live technologies in your web site then you'll find Windows Live Quick Applications very useful.
Currently there are two samples available
Contoso Bicycle Club (code) which Connects membership organizations with the content, information and communities they care about using Rich media experiences, Sharing and storage, Communication, Find and locate (maps) Windows Live Technologies. and
Contoso University (code) which is intended as a University sponsored site for students and staff to connect with the university events and social organizations. This demo uses quite a few cool things, like the Contacts API where if you are a student of Contoso University you can delegate permissions for this web site to access your Windows Live Address Book (Hotmail / Live Messenger / Spaces friends), you can list all your friends and their location can be plotted on a map etc.
and there is one coming out soon
Contoso ISV which is a Customer Acquisition / Professional Services site that was presented by Steve Ballmer's keynote @ Worldwide Partner Conference. According to Angus Logan's post
The scenario is a Microsoft Partner's web site tricked out with lots of great stuff, customer's can come to the site, view the videos, blog entries, presence of the authors and then start a conversation with a sales representative. The sales representative can schedule the sales call without leaving Windows Live Messenger
and demonstrates the following Windows Live technologies