This is something that my wife andI want very badly as we had that capability on our old feature phones. however, after speaking with my friend who has an EVO, we will not see that functionality until Froyo (Android 2.2) is released for the Epic. We should see that by the end of the year. I am willing to wait for that to insure they get the operating system correct for the Epic.
That's correct. No Android has Voice Dial until 2.2. Some manufacturers implement their own on Android devices, but are not that very good. You could also download one from the market which works somewhat ok.
Like Tidbits said, you can download something from the market but they aren't very good. They can be a replacement til we get 2.2 though which it way better.