SORBS?!

Hello, Is anyone from SORBS still listening? We have a few IP addresses here and there that are listed, one in particular that has been for a spam incident from over a year ago. The "last spam" date is 03/05/2011 according to their lookup tools. We don't have access to their Net Manager even if our ARIN POC corresponds to the account on their system we opened a while ago. We use their ISP feedback form and never get any responses back. Is SORBS still relevant and functional? Sincerely, Chris Conn B2B2C.ca