If you can't make the Indianapolis gathering, Turbine's hosting another gathering in Seattle:

Turbine is hosting a party for Turbine players! Join us at Gameworks Seattle from 7:00PM - 9:00PM on Friday, August 29th 2008. Asheron's Call Producer Crowley, LOTRO Executive Producer Nigellian, LOTRO: Mines of Moria Producer Eldrad, the enigmatic Marketroid, Community Team members Patience and Frelorn, and more will be on hand from Turbine! Food, games, fun, and swag - what more could you ask for?

You can visit any of the threads at the official sites to RSVP (here's just one).