A few times a year, the guys at Doctor Who: Podshock have a virtual meet-up in Second Life.
If you're not familiar with Second Life, it is a virtual world created by Linden Labs, where people can create custom "avatars" to represent themselves as they move around in a virtual world.
People spend hours and hours in this virtual world, creating virtual items from clothing to working machines, and some fans have even created a "working" TARDIS, and a reproduction of the Cardiff Bay area, adorned with Doctor Who posters, statues, and other icons from the show.
