Jott Rocks
I have not been able to convince anybody else of this, but I love being able to speak reminders, appointments, whatever and have them jotted down in the appropriate place. Especially being able to Jott Remember the Milk is a dream come true (albeit a sad and small one). When I remember I need to do something I can just Jott it right then and its on my to do list which then syncs everywhere. I forget a lot less things I am supposed to do.
If anybody wants to try it, their URL is: www.jott.com