Exchange UM blogcasts
"It does much more than that... You can cancel all of your meetings, record a voice mail attachment and send that out too. You can get a reading of your email and calendar items too. From whatever phone you use, wherever you are. And if the sound quality isn't good, and the UM assistant doesn't understand, you can always switch to dial tome commands. I recorded some blogcasts so you can see this working. The sound quality is terrible so I haven't blogged about them (until I've recorded them again!). the URL's are here though if you want to watch it in action..."