I want to say that Atlanta would never do that trade, but they are the same organization that gave Joe Johnson the biggest contract signed this offseason. They overpaid for him more than Orlando overpaid for Rashard Lewis a few years ago.
If Atlanta did this trade, I'd be all for it in a heartbeat. But again, this is an extreme longshot.
Regarding Thompson, I'm not comfortable trading Davis for a SG/SF, unless it was a multiplayer deal that gave the Celtics improved talent. Davis is particularly valuable this regular season so that our other bigs can rest more.