Notes (from the Mail app on a Mac computer, and the Notes app on the i Phone) were synced via the Mobile Me service, however were unable to be viewed or edited online.
To Do lists (controlled from the Mail app and the i Cal app on a Mac computer) were viewable and editable through the Mobile Me website (under the Calendar tab), but were not viewable or editable on an i Phone.
On June 6, 2011, Apple announced that a new service called i Cloud would replace Mobile Me sometime in the fall.
At the i Phone 4S special event on October 4, 2011, Apple announced it would finally launch i Cloud on October 12, 2011, to replace Mobile Me for new users, with current users having access until June 30, 2012 (on that day the service would cease).
Mobile Me featured i Disk, an online storage repository accessible via a web browser at me.com, Finder on OS X, various apps for i OS devices, or as a remote disk in Microsoft Windows.