WPA is quite a bit more secure and quite a bit less supported. Cracking a WEP is rather problematic too though. Bruteforce is all nice and fun, but considering the fact that most routers give good delays between inputs and ban your cards ID for a day after a serious number of tries, does make it rather useless. The other alternative, being the decryption of seperate transmitted packages, is also rather hopeless leading to naught due to inconsistancies during the transfer.