if you used brain wallet and the passphrase to create the address had less characters then this sentance.
then you probably had a weak passphrase that any script kiddie could hack using random character generators
This could be likely, however I just tried loading
https://brainwallet.org and it just loads two words: 'Closed Permanently'
Who knows whats happening, but being closed permanently sounds like brainwallet.org is done.
OP, How did you use you use brainwallet? By getting the source from Github, then copy that Javascript to a machine offline? Or by loading the actual web-page from
https://brainwallet.org on a machine connected to the internet?