iTunes reads in Outlook data (which can sync with a Palm PDA), then sends it to MobileMe. No mention is made of calendar, notes or task synchronization. iTunes by itself has some capability to browse calendar data, but I’ve never tested that.
…Windows and MobileMe: Windows and MobileMe play surprisingly nicely together. MobileMe comes pre-packaged with iTunes 7.7 for Windows, and lives as a Control Panel item. You can then choose to sync contacts, email, and bookmarks. For bookmarks, you can choose which browser to sync with, and MobileMe works with Safari (of course), Firefox, and Internet Explorer 7. IE7, though, doesn't work a hundred percent with the web apps, so Apple recommends you use Safari or Firefox instead. For more information about how to connect your Windows computer to MobileMe, you can visit Apple's MobileMe support page.
I couldn’t find anything more on the MobileMe support page. I’ll update this post if I find more details in Apple’s kb or support. I’ve yet to purchase MobileMe – waiting until it’s been stabilized.