Boston gets Ryan Anderson, Jameer Nelson
Orlando gets Monta Ellis
Golden State gets Rajon Rondo
Clearly Nelson is a downgrade from Rondo, but he is still a former all star, but Anderson looks like he might be a monster.
Orlando has a lot of money invested in Davis and desperately needs another scorer like Ellis to pair with Howard. Also there are reports that Howard doesn't like Nelson, so that might help in that regard as well.
Golden State gets a superb defensive PG and can allow Curry to slide over to SG (which would be fine against most teams).
Seems like a fairly even trade for all three teams, though I'm not sure Orlando would want to get rid of Anderson for Ellis unless they were sure it would really affect Howard's decision in the positive.