They even have a blog for it. Of course it requires XP and when selecting Get the Beta, it points to the purchase directory, so I am wondering what it will cost after the Beta, or will they leave it in Beta like others.
Antivirus and firewall programs known to conflict with Windows OneCare:
Symantec Norton Internet Security 2005
Symantec Norton Antivirus 2005
Symantec Norton SystemWorks 2005
McAfee Internet Security Suite 2005
McAfee VirusScan 8.0/2004
Trend Micro PC-cillin Internet Security 2005
During Setup, Windows OneCare checks for the programs listed above and will notify you to uninstall any that are found. To avoid any potential problems, however, Windows OneCare recommends that you uninstall any other antivirus and firewall software (except for Windows Firewall, which is part of the Windows XP operating system and cannot be uninstalled) before beginning Windows OneCare installation.
I might be interested in the Beta, but do I want to remove my existing paid for firewall and anti-virus to try out the beta. I don't think so.