The Third Annual TARDIS Expo is set to take place at TARDIS region in Second Life this year, October 9th and 10th. Details to follow on that, but having participated in last year's, I can tell you that it is a fun way for builders in Second Life to show off their work. People make their own TARDIS exteriors and present them at the exposition. Two days of music, dancing, and builds...fun for the whole family! See the ad below.
I will, of course, be participating in this year's expo. I'll have all my exteriors displayed, and maybe a console room or two. I'll keep you updated as I learn more details.