my only question (and mind you, i think it's a great trade for the lakers) is how do you play two low post players at the same time. there is only room in the post for one. and while gasol has an adequate jumper, it's not really his main weapon. you won't be maximizing him. usually when you have a nice post player (like ewing or shaq) you try to team him with an enforcer who hits a nice j (like oakley or horace grant). two posts is unusual and likely crowded.
I haven't watched Gasol as much as some have, but he seems to have a nice face up game, and most likely will be able to work a lot out of the high post. He has good assist numbers for a big, and when he catches he almost always faces up. In the triangle as a post guy, most touches are at the high post or as a low post threat. I think he gives them the ability to have him play all over the place. Wether Andrew is in the game or not.
Plus, so far in Bynum's development, he has shown a nice ability to pass and to get weakside lobs. His post game is coming along, but he isn't a guy that can only score from the deep block.
I think those two guys will be able to play off each other very well. Especially in the triangle, where plays are based off of strong side (3 players in 'triangle') and weak side (other two players), and will allow both guys to be threats. Also, teaming the two of those with Odom, will give us an advantage on both the offensive and defensive boards almost every night.
There will definetly be an adjustment period, which is why I am still personally not among the group expecting a championship this year. However, the trade leaves us with the biggest front line in the league, with a multiple of guys that have ability (especially rebounding and scoring).