And here's why -  Right now there are 11 teams who have now or will have a significant need for a PF this summer.

There are 4 decent PF's available in Free Agency this summer  (Bosh, Amare, Boozer, Lee) and 4 decent PF prospects in the draft (Favors, Cousins, Davis, Monroe).  These 8 players will effectively satisfy the PF need of the 8 most desperate teams for at least a year.   There are some other PF's in the draft that might fit the need at PF (Aminu, Patterson, a few others).   At least one of these guys will hit.

Which means that this summer only 2 teams will be remotely interested in trading for a PF.  Right now there are 11 teams with PF being an open question mark and team need.

And of course I'm in the camp that doesn't believe Al is a building block, retards the team's development and is redundant with Pekovic.

Kahn should make these 5 offers right now and accept the first that responds:

Indiana:  Granger for AlJeff  (highly unlikely)

Charlotte:  Gerald Wallace (and filler) for AlJeff  (somewhat unlikely)

NJ:  Simmons expiring contract and NJ's 1st pick for AlJeff (unlikely)

Bulls:  Noah + bad contract (salmons or Hinrich) for AlJeff  (feasible)

Wash:  Miller's expiring contract and Wash 1st pick for AlJeff  (feasible)

If no one bites, there is a little time to get creative with other offers.  But I can't see Al bringing back anything near this value in the Summer.