One click calling on the Epic 4G?
After unlocking, when I press the Phone icon (on the TouchWiz interface's dock at the bottom of the home screen) it takes me to the last dialler view I used, whether that's the keypad, Log or Favourites. Doesn't yours do that?

If you literally mean the same 3 people, then the quickest way would to put a shortcut for them on your home screen. Just long-press on an empty bit of homescreen background, select Shortcuts, select Direct Dial, select your person.

Alternatively, Star the contacts in GMail, then put a Starred Contacts folder on the homescreen (long-press on an empty bit of homescreen background, select Folders, select Starred Contacts).

PS yes you probably are one of the few using it as a phone, these are smart phones for people who love email/messaging and internet apps, not dumb-phones for making calls on ;-)