The two deals are almost done/official!
It will be Rashard Lewis for Arenas, straight up, with no other players involved.
The second trade is the following : Pietrus/Carter/Gortat + 2011 first round to Phoenix for Turkoglu/Jason Richardson/Earl Clark.
Phoenix is clearly the winner in the deal, Turkoglu's return to Orlando could be interesting to watch but I'm not sure it's a good move, especially in terms of Orlando's financial ressources for the long run (Arenas and Turkoglu have HUGE contracts).