I have to tell you that I thought about this after I read one of Javier's posts at his blog. It was a reminder of what I already knew, but he shows you how to enable SSH as well, and I thought about the security aspects of this and about how many attacks actually come from the inside of the network. It was this post: Enabling SSH on the ICX6610. Check out Javier's blog.
So how do you enable SSH and disable telnet on a Brocade switch? Ill show you the config:
ENABLING SSH AND A USERNAME
Switch(config)#crypto key generate rsa
Switch(config)#username shanekillen pri 0 password passphrase
Switch(config)#aaa authentication login default local