The new MobileMe Control Panel 1.6.2 provides push calendar updates and support for proxy servers when using the MobileMe Calendar beta with Microsoft Outlook. In addition, you can now upload your personal Outlook calendars to MobileMe to keep them in sync across me.com, your iPhone, iPad, iPod touch, Mac, and PC. Just run Apple Software Update on your Windows PC to upgrade. Or download it here.
via apple.com

