This is disappointing and scary. A friend on another forum posted that some guy on IRC told him the last 4 digits of his CC and his e-mail address. I just called my bank and cancelled my current CC and give me a new number. I really liked Linode too :(
FYI, the last 4 and your e-mail address are both visible in plaintext from your /account page in Linode Manager. Obviously, still disappointing and scary, but it doesn't necessarily mean that whoever has that information also has the full CC number.
