Apple today released MobileMe Control Panel for Windows which is required to manage iDisk settings and to sync contacts, calendars, and bookmarks on a Windows PC.

This update is required for Windows computers running iTunes 9.1.

System Requirements:
• Windows Vista SP1 or later or Windows XP Home or Professional SP2 or Windows 7
• Microsoft Outlook 2003 or 2007 for calendar sync
• MobileMe Account
• iTunes 9.1 or later

More info and download link here.