From SI.com

[Eggcentric@xxxxxxx]

This trade is fraught with peril for both teams. The Mavs get an 
All-Star in Walker, but playing-time issues in the frontcourt 
could threaten team chemistry and leave Nelson reaching for the 
Maalox. Unless Dallas makes another trade, Nellie is either going 
to have to play Nowitzki at center or leave either Jamison or 
Walker on the pine for long stretches. Either way, it figures to 
leave one player unhappy while doing little to solve the Mavs' 
main weakness of a soft interior defense. The Celtics, meanwhile, 
suddenly look like a one-man team with Paul Pierce as the 
Lone Ranger. Ainge is right in seeking to change Boston's style 
of play. The question is whether he could have acquired more in 
exchange for a three-time All-Star. If Boston doesn't make the 
playoffs, which is a distinct possibility now, Ainge will 
take some heat.