Earth and Beyond has been back, resurrected by the fanbase and some clever home-brewed developers. I've played it in its current form, and while imperfect, it is definitely worth your time and exceeded my expectations.

Oh yeah and it is free. Google Earth and Beyond Emulator, or EnB Emu. The website is a bit confusing, but no joke, this game is legitimately online with hundreds of players. They just announced adding additional servers, it has quite a bit of support.

http://www.enb-emulator.com/