AnonFinland announced yesterday that they were releasing nearly 500k emails and passwords. The information was stolen from several Finnish websites. The accounts haven’t been confirmed as legitimate yet, because AnonFinland only released the emails and passwords without what websites they belonged to.
The group announced the release in true Anonymous fashion on twitter:
The emails (sans passwords) are available here, so if you were wondering if your information was compromised, you can check for your email there. I believe all the accounts compromised were the result of cleartext passwords.