Nowadays, there are companies out there that are making bamboo bats as well as composite wood bats that come w/ guarantees against breakage.
Mizuno makes bamboo bats w/ a 90-day guarantee (I own one and use it in our wood-bat MSBL league) and they cost @ $70. Baumbats is a composite Ash/plastic bat that is just awesome. They're about $200, but again, are guaranteed for 6 mos. or an entire baseball season. The Baumbats (one of my guys has one) hits really well and the ball jumps off of it (like a true Ash bat, not talking like the jump off of an aluminum bat).
So the argument that it's too expensive to switch to wood bats vs aluminum is starting to go the way of the dodo bird.
Mizuno Bamboo: Purdy!
Mizuno Composite Maple: Composite
Baum Research Co: Baum
Brett Bros: More purdiness
Demarini: Maple head, composite handle