Ok, let's get this out of the way first.

Fallen Empire is only started from the browser. It runs from an exe on your hard drive, which you must download etc. And this is the spirtual successor to Tribes. It is being made by the same team who made (most of them anyway) Tribes 1.

The other games Instantaction offers, such as Marble Blast Online and Think Tanks are true browser based games, and run from within that browser space itself. And are very impressive.

Currently however, Instantaction only has MBO and Think Tanks (along with two other games). Fallen Empire is NOT yet available to the private beta testers.

As I am in the beta now, I believe I can invite people to it. I'm not sure however if those I invite get RIGHT into the beta, or have to wait.