I also got that black screen with the light green lettering on Monday. Except I think the message I got began with, "You have been hacked!" I went into a complete panic because I thought someone had hacked into my computer.
I am so relieved that it seems to have been a problem with someone hacking into a2k rather than someone hacking into my computer. I can't tell you how many virus scans I have run since Monday and how much checking I have done to see if a hacker managed to affect my computer.
I am so glad I found this thread.