Dickey was an assistant coach under Frank Broyles at Arkansas went to Tennessee in 1964 then later went to his alma mater Florida where he replaced an ex-UT player, Ray Graves.
I don't necssarily buy the concept that you don't hire a coach from a rival SEC team. Look at Georgia, they had an ex-Auburn player (Vince Dooley) as coach while Auburn had an ex-Bulldog (Pat Dye) as their coach.
Muschamp might become an excellant head coach. Many will say that UT is such a big name program that they would require an established head coach to replace Fulmer. I say look at Bob Stoops at OU where an assistant went to a big name school with obvious sucess. (I'm not saying that Muschamp is another Stoops).