From an article on TorrentFreak.com:

After taking control of Shareaza.com, imposters trying to pass themselves off as an open-source dev team have stepped up their action to destroy the GNU GPL licensed project. In an audacious move, lawyers representing Discordia Ltd have filed to register the “Shareaza” trademark at the US Patent Office.

The real site is at http://shareaza.sourceforge.net/, meanwhile the Shareaza.com site has been taken over by an impostor.