This angle would be sheer brilliance if it was just one five minute segment of Vince chasing Mr. America Keystone Cops-style, only to trip over something, left only to shake his fist and go "I'LL GET YOU HOGAN, IF IT'S THE LAST THING I DOOOOOOOOOO!" If Hogan would then go "woowoowoowoowoo" like Curly, that'd also be pretty choice.
But instead they waste half the show with it and it just becomes plain stupid, not cute stupid.
After getting a look at the spelling in his letter, I'm going to guess that Johnny himself still doesn't know that. (Maybe that's why they repeated it every week.) They are, according to PWInsider-via-411: Click Here (411mania.com).