According to TSN:
The Atlanta Thrashers traded defenceman Niclas Havelid and forward Myles Stoesz to the New Jersey Devils in exchange for blueliner Annsi Salmela.
According to NHL Numbers, Havelid is making $2.9m this season and will be a UFA on July 1st. Salmela is an RFA this summer and is currently on contract for $562k. It has been rumored for the past month or so that Atlanta would trade Havelid knowing that they are out of playoff contention.