Currently Being ModeratedOct 16, 2011 1:01 PM (in response to willyjp)
Reminders are part of the iPhone backup, wherever it goes (iCloud, Mac via cable or Mac via iTunes). However, I haven't found an app that they sync with. They do appear in iCloud, but I've found it to be "quirky", in that Reminders in iCloud have different fields and capabilities than those on the iPhone.
Currently Being ModeratedOct 29, 2011 8:54 AM (in response to Lawrence Finch)
I believe that reminders synch as part of calendars through iCloud. In iCloud.com, reminders show up as a separate calendar. In iCal reminders show up as a to-do list. On a PC, they show up as a separate calendar. On iOS devices they show up in their separate application.