Microsoft recently shipped beta 3 of the Speech Application SDK which allows developer to build voice response telephone apps as well as multi-modal web apps for desktop and pocket IE (with Microsoft Speech Server which just went beta 1) . But you could only get the SDK by ordering a CD. Not being the patient sort, I downloaded it internally (one of the many benefits of being b0rg). Now, all the impatient people can write speech enabled web apps, since the SDK showed up on MS Downloads today. Enjoy.