Early versions of the onAir system include the iLands 3D online topical worlds-some of the first applications for 3D topical online environments using standard DHML and XML web software (2001).  Topical worlds were visualized as iLands (pre-Second Life).   More Screen shots here.

Bird’s Eye Tour-  Adapted the 3D web-based worlds iLands platform for the Districtof Columbia Government’s acclaimed DC Bird’s-eye Tour (2004), an online, user controlled system for navigating around downtown DC and learning about government buildings and nearby commercial places.Commercial version, Citilands, developed to promote and provide information for Business Improvement Districts (2005)

Below is an article by Gary Arlen in the Washington Post about Air 2.0

Washington Post October 1, 2001 By Gary Arlen

Two days after the tragedy, I visited a garage-level startup somewhere out Interstate 66. It was a refreshing break to spend a couple hours with the prototypical entrepreneurial team — the techie and the marketer — who could focus on their latest business vision after the initial discussion about the horrific events of Sept. 11.

As an inside-the-Beltway denizen, I venture cautiously into the netherworld of outlying Northern Virginia. The principal member of the team (the marketing guy with the money) has ...

Our version Air 3.0 used the DrupalCMS  and was platform for aggregating information and knowledge on a particular topic with subject matter experts as guides and curators  one implementation Web Health Directory (2005)