Spacetopia (Popularity: )
http://www.spacetopia.com/ Provides membership forum and documents of Japanese organization, and of a club dedicated to space tourism.
Space Future (Popularity: )
http://www.spacefuture.com/ Features news and an e-zine dedicated to space tourism, habitats and vehicles by a pro-space group. Frequently updated.
Virgin Galactic (Popularity: )
http://www.virgingalactic.com/ Airline offering suborbital spaceflights with a new version of SpaceShipOne. Provides description of flights, the vehicle and offers bookings starting ...