Directly from the Hellgate London website:
For questions regarding the shut down or additional information about Hellgate: London, please visit the game’s official website at www.hellgatelondon.com.
Santa Clara, Calif., (October 24, 2008) – NAMCO BANDAI Games America Inc., today announced that they will continue to support customers of PC game Hellgate™: London with online server support and play through January 31, 2009 despite the closure of Flagship Studios. In a further gesture of support, Namco Bandai Games will provide this server support free of charge to all fans and players of the game up until the shut down date.
NAMCO BANDAI Games appreciate the enthusiasm of all the Hellgate: London players and looks forward to providing them with future entertainment products.
P.S. All the sub features and everything are open to everyone till servers go down.