Microsoft has released a new version of Windows Live ID Sign-in Assistant. The latest version 6.5 adds Windows Live ID online provider for Windows 7 which
Through the online provider, the Sign-in Assistant helps a Windows 7 application running on one computer identify and communicate with other computers that are associated with the same Windows Live ID. Just by linking your Windows Live ID to the user account on each Windows 7 computer you own, you enable those computers to identify each other and work together more easily than has been possible in the past.
If you have an online account, such as an e‑mail account, you can link that account with your Windows 7 user account. Linking these accounts lets other people
After you have installed the provider, you’ll notice ‘WindowsLiveID’ added under your Online ID Providers.
Linking your account is a two-part process. First, you need to add your online ID provider, and then you need to link your online ID with your Windows user account.
Additional online identity providers might be released when Windows 7 gets commercially available.
The Windows Live ID Sign-in Assistant 6.5 Beta is supported on both x86 and x64 version of Windows 7.
Download Windows Live ID Sign-in Assistant 6.5 Beta for Windows 7