I like this proposed deal for both sides but more for Philly than Phoenix.
For the Suns it gives them an athletic center that would let Amare slide back to his natural PF spot. It also clears up a logjam at the 2 & 3 where they now have Marion, Johnson, Richardson, and Jackson.
For Philly it gives them a third scorer and a another great wing defender to pair with Iguodala. Plus, Marion gets a lot of his points off the break, rebounds and spot up threes. Being able to score without having many plays run for him helps him as a potential teammate of Iverson.
Here are the problems I see with the deal. For Phoenix it does nothing to solve their biggest problems, defense and payroll. Defensively, Dalembert will help as a shotblocker but he still gets pushed around, just like Hunter did this year. More importantly, the Suns are coming up against serious cash problems. JJ is a free agent. Steven Hunter is a free agent. Stoudamire is going to need a new deal. Plus they already paid top dollar for Nash and Richardson. Trading away Marion and his max deal would help, but not if the player coming back (Dalembert) has a similar long term deal.
For Philly, the only real problem I see on the court is that it puts Korver and his shooting on the bench. Not a big deal, but it means teams can further pack the lanes to stop the Sixers.
I doubt Philly will get as good an offer for a player who can leave for nothing, but if they do, they should jump on it. Assuming they can't (or don't want to) resign Dalembert themselves.