From the top football blog I've found... and no, I don't get a referral fee.
ProFootballTalk.com pieces the evidence together like an episode of CSI: Miami (Dolphins)
Sparano lining up his staff: http://beta.profootballtalk.com/2008/01/06/sparano-lining-up-his-staff/
Sparano and Parcells share an agent: http://beta.profootballtalk.com/2008/01/06/tuna-sparano-share-an-agent/
Word of the decision has leaked: http://beta.profootballtalk.com/2008/01/06/sparano-leaks-could-create-huge-mess/
One caveat- Parcells denial: http://beta.profootballtalk.com/2008/01/06/tuna-denies-that-sparano-offer-was-made/
UPDATED 1/7: Fins get fishier; hire QBs coach before hiring a Head Coach: