According to Adam Schefter, Mike Mularkey is high on the list of potential head coaches for the Jaguars, and he's a much better fit than Mike Sherman.
Last season, the Falcons offense under Mularkey looked unstoppable. The Falcons went 13-3 in the regular season, only losing to the Saints, Steelers (in overtime) and Eagles and consistently put up 30 points or more on their opponents.
This season, the Falcons have underperformed a little bit, but they're still very much in the playoff hunt at 7-5.
Mularkey has also, briefly, held a head coaching job already. Again, with the Bills (2004-2005).
He's consistently fielded great offenses and that's what the Jaguars need right now. Plus, Mularkey is apparently one of their top choices, so he's a great fit.