I find it interesting how much activity the brainwallet address generated by "correct horse battery staple" generates!
This is the default brainwallet in place if you go to generate something at brainwallet.org.
https://blockchain.info/address/1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1TYou do see money frequently going in and out of this address, but somebody actually sent a whole 0.8651 BTC (worth more than $800 at the time) to the 'correct horse battery staple' address just two days ago...
Unsurprisingly, it left the account about 10's afterwards...
Sadly, the only sane explanation I can think for this happening...somebody went to generate a brainwallet using this site but accidentally refreshed and used the default 'correct horse battery staple' instead of their own passphrase
This story on reddit about somebody managing to randomly guess a brainwallet with 400btc is also relevant
http://www.reddit.com/r/Bitcoin/comments/1ryj9s/help_i_might_have_access_to_your_wallet/Anyway, I think the point is that given how much effort people will now be putting into trying all the possible brainwallet combo's highlights how this is really quite a foolish way of storing your coins.
If you are trying to think up a brainwallet passphrase with enough entropy...you may aswell just use a properly pure private key and keep it safely offline.