A lot of things are blocked now at my workplace.  They run a monitoring program called "Websense".  I can get to some independent message boards & blogs, but all the major ones are blocked.  Though I can read & post on Yahoo groups via e-mail, mostly I just read.   A few things that were accessible at first are now blocked (xProdigy), and a few things that were blocked at first are now accessible (religion websites).   I don't spend much time on the message boards anymore.  Most web storage is blocked (photo storage), but I can use Google documents.  Google docs is a pretty cool feature.
  
