You are correct, Ahso - he didn't make his son an O coordinator, but he did make his son Todd the QB coach. I think the shortcomings were Quncey's not Todd's - but who knows.
Other High Profile guys with their sons at OC include Lou Holtz and Bobby Bowden. Bob Stoops has his brother Mike at DC. I doubt you confused those, but FYI in case.
Todd Donnan is a close friend of a close friend, and I have some inside scoop on the firing that I would love to tell, but would be breaking confidence - I'll just say that place was a circus by the time Donnan left.
Like I said - he should be hirable. He learned a ton the hard way and the guy's a good coach and won't make all those same mistakes again.
Unsure to those asking about payment - but I am pretty sure it works this way. UGA has to honor his contract - which means they must pay him until it runs out - unless, even though they fired him, he goes to work for another team, which at that point, uga is off the hook.
When he goes to another team - it's the equivalent of him leaving them (under contract - coaching or not) to go to another school. Not sure how long is left.
Like I say - I think, but I'm not sure on the contract stuff.