After 5 years, the popular BitTorrent client Azureus is no more. The Vuze team has officially abandoned the Azureus name and the new “social†BitTorrent client is now completely integrated into the Vuze content distribution platform.
Don't think it is going to be as popular as it was before. Version 3 was getting bloated everyday, and it actually became very slow even on systems with lots of memory.
Source : Azureus is Dead, Vuze Goes Social | TorrentFreak