I was searching for some information about a scam that was pulled on me two days ago; I sold one bitcoin on ebay, got paid with paypal and sent the coin, then immediately there was a claim filed and the money was taken away. The address I sent it to was 18HHRpghTbFcNb7zeEwBgSRp3UFq7cBFG5 , so I was looking through blockexplorer for info, googled one of the addresses my stolen bitcoin was sent to, and came up with NathanKBarrows from Hackforums.net
One of his posts mentioned a wallet stealer from their forums stole 25k BTC, and I thought I remembered someone here recently losing that many.
I'm not sure how helpful this information is, if at all, but I wanted to share it with the community.
I would have just linked to the forum post, but it requires a membership to that forum, so I used the google cache and took a screenshot:http://i.imgur.com/jkV1F.png