From the WXPnews [ news at news.wxpnews.com] newsletter:

Microsoft has been beta testing a new subscription service called OneCare that provides firewall, anti-virus, spyware detection/removal and backup functions all in one. Now the beta program has been opened to the public. To sign up, you’ll need a Passport account. Point your Web browser to the Microsoft Beta site and sign in with your Passport username and password, then enter “OneCare” (without the quotation marks) in the guest ID field.

About beta.microsoft.com

Q: Is this a real Microsoft site?
A: Yes! Microsoft Beta is Microsoft’s new technical beta Web community that was designed as a tool for product groups and beta testers to interact within a consistent and secure environment.

Q: How do I get a Guest ID?
A: A Guest ID is issued by Microsoft to grant special access to Microsoft Beta. Guest IDs are not available by request.