I can't really find any reference on the Internet to prove that Homer & Jethro actually sang "Phfft! You Were Gone." It appears to me that Bob Newman sang this song on his "The Kentucky Colonel" album in 1959. He is listed as a comedian (http://www.hillbilly-music.com/groups/story/index.php?groupid=12013) so this is probably where the first parody was done. Of course, later versions of this song appeared by Archie Campbell on his "Have A Laugh On Me" album in 1966, and by Buck Owens on his "Too Old To Cut The Mustard" album in 1972. This latter album was released after Hee Haw aired. If you have an actual album name and date where Homer & Jethro sang this song, please post it here. Thanks!