TorrentSpy was under court order to begin logging traffic of their users so the MPAA could seek legal action against downloaders. The order was appealed but that appeal failed.
Instead of complying, TorrentSpy has blocked all US users from their tracker. If you used TorrentSpy and live in the US, congratulations on being blocked.
Their users are primarily foreign so this won't affect their traffic much, but the MPAA will keep fighting them even as their ship sinks into the depths of the internets.
Variety: TorrentSpy shuts out U.S. users