bruteforcers are kindof inneffective. they hardly work and people will just call you a script kiddie if you use them. in some cases they are useful. but if its a job for hacking, then let hacking do the job.
Bruteforcers don't work on Battle.net period. After 5 incorrect password attempts, they get disconnected. You have to go around 10,000 tries to get a password, do you realize how long that will take??? Just send the guy a trojan, much easier, and faster
I beleive you cannot use brute force on diablo, because it has to be a site that has a log in/password box ONLY. Search for Munga Bunga's HTTP Brute Force. I have that one, it works quite nicely, and quick if you have cable/dsl, but if you have 56k it will take up to 60 hours to complete a dictionary of my size, if you want the site and a site to get a better dictionary just pm me, i will send you a link. (when i had norton 2003 I scanned Munga Bunga's Brute force and it turned up clean)