I found myself on the Avination grid. A shopping grid where you find some stores but most of all a payment solution for Opensim grids everywhere.
VirWox is a Virtual world Exchange for grids and Second life. They say they have 25000 registered users. But the big thing is that you can use A Open Metaverse currency to buy stuff on other grids making business and rentals go off the Second life grid. Once more Linden lab missed out on a great business idea. The bad thing is that you cant transfer the stuff you buy to Second life. It is time to connect worlds everywhere. I am a explorer and want to use my things on all grids. Have to wait I suppose.