Here's what I'm going to do.
Since my old computer was a piece of crap and had a tiny 40 gig HDD, i bought 100 gig external HD for like...60 bucks
I routed my iTunes music folder onto the external HDD so iTunes accessed all of my music through the external HDD itself. This makes it easy to transfer to a new computer. Connect the external drive to the new macbook, and then just drag the iTunes music folder from the external drive into your music folder on your mac and make sure iTunes links directly to wherever your music folder is...
Maybe it sounds more complicated than it is because of the stupid way i described it...but trust me its easy to do.