Outlook Voice Access demo
With Exchange Server 2007, currently in Beta, the ordinary telephone suddenly becomes an alternative to desktop Outlook. You can access and manipulate your email, calendar, contacts and other mailbox items over the phone, thanks to built-in speech recognition technology.
Here's a demo (110Kb or 300Kb). See also the live demo at the People Ready launch in New York earlier this year.
(Via the Exchange Team blog You had me at EHLO.)