Jake of the Web

http://www.jott.com/
Allows you to have your speech converted into text and sent via text message
or email to yourself, friends, or groups.
After setting up your account, you can call their toll-free number, say who
you want to contact, and dictate any needed message. These messages are
actually dictated by real people - the same people who dictate medical
dictations.
You can also add posts to your Blogger blog, add appointments to an online
calendar called 30 boxes, or work with a handful of other sites and
applications.
They also have a downloadable desktop tool called 'Jott Express' or an
online Google widget for your Google home page.