GDC Austin organizers are reminding 2008 Alumni that they can save up to 40% on All Access and Main Conference passes by registering by midnight on July 30th.

For those who previously attended the online gaming-centric event (owned by the same company as Gamasutra), the Main Conference pass is available at a major discount until midnight tonight.

GDC Austin, to be held September 15th-18th, 2009 at the Austin Convention Center in Texas, now includes six online-centric 'tracks' for the Main Conference, which takes place Wednesday 16th to Friday 18th. More than 120 sessions will be available covering online games, MMOs and social networking games, from business through technical to design and beyond.

In addition, access to the major GDC Austin Indie, iPhone, Writing, and Audio Summits -- which take place on Tuesday 15th and Wednesday 16th -- are also available for those alumni wanting to purchase All-Access passes or Summits & Tutorials passes.

More information on the overall 2009 GDC Austin event -- which recently added a Blizzard duo discussing World Of Warcraft as a keynote, and is still to announce a number of major lectures and roundtables -- is available on the official GDC Austin homepage.