It almost happened according to Mike Keenan.

I am watching a Playoff Preview on Sportsnet and they have a segment called 'The Strategy Room' with a talking head and some former GMs:Mike Kennan, Neil Smith and Doug MacLean.

They were talking about past deals/offers and Keenan said he was told to trade Luongo...

He revealed that Boston offered Joe Thornton, but weren't willing to take Luongo's contract (I suppose they were asking to Florida to pay for some of the contract?)

Anyway, it didn't happen obviously and Bobby Loo is plying his trade for Vancouver.

Thank God we didn't make that trade!!!