[evandavid]

For people who can't remember if they ever signed up:

Go to gawker.com and use the 'forgot my password' utility. It's under login > forgot my password. Enter your email address in the field provided. It will tell you straight away "That email address is not in our records. Please try again."

I can't think of any reason this would be incorrect based on the recent events. Of course, this doesn't tell you whether your password is vulnerable, just whether you have an account.