Jott™ - Official Site
The site is really great, once you register your cell phone and email with them. When you want to send an email to either yourself or anyone that you list in your jott contacts, you can send a 30 second message to their email from your cell via voice recognition... you can also listen to the message.
I found it useful for sending a written message to my email (at work) so I would not forget certain things. You know, driving down the road and you think of something, no pen, no worries just call the 1-800 number and leave a note for yourself in your email account via phone.
Not for some of you, but for me (on the go constantly) I found it very useful. Best of all, it is free!