Dereos is running with ArribaSIM and a special PHP based gridservice.
This allows a good performance in the grid.
Akira Sonoda has transferred the changes from Freaky Tech in ArribaSim to the 0.9 sim version. This sim is currently in test mode. But the performance is already very good.
Dereos isn't a grid for free registrations. Even the free docking of simulators is not possible.
If you are interested, contact Akira Sonoda for more information.
Arriba & PHP Gridserver
ArribaSIM is an OpenSim fork developed by Freaky Tech, further developed by Akira Sonoda
The PHP grid server is an in-house development by Freaky Tech for maximum performanceda