Currently at least Admino Technologies provides public servers. Visit http://www.adminotech.com/ You can also test drive the realXtend Tundra technology by visiting the LudoCraft Circus: http://tundra.ludocraft.com/circus/ Another public server can be found by following the instructions here http://realxtend.org/2012/08/27/a-church-in-the-clouds/
Grey skies, Ali Kämäräinen -- http://groups.google.com/group/realxtend http://www.realxtend.org