Well, theoretically it can be cracked... but it'll take more time than the earth has before being scorched by the sun... :)
rahmu wroteThis quote comes from the people who came the closest to effectively crack AES.
"To put this into perspective: on a trillion machines, that each could test a billion keys per second, it would take more than two billion years to recover an AES-128 key," the Leuven University researcher added. "Because of these huge complexities, the attack has no practical implications on the security of user data."
source
Cracking WPA is probably more difficult than climbing Mount Everest, walking on your hands. If you want to have fun and impress your friends, stick to cracking WEP. In any case, it's still way too commonly used, so you won't have any troubles finding WEP encrypted signals.
oh yea.. that