OpenLife is just like a sim on your own computer but bigger. OpenLife uses the same server (OpenSim) but is more customised version with custom patches for Openlife.
As Gitfinger said, outside sim connections is planned but not essential yet. I would think stability, function and security would have to be at a Beta stage at least before considering implementing that. We are still alpha stage so far.
If you wish to get your own system with website register and avatar creation you can use the tools already provided in the OpenSim software. There are templates for this inside the folders of the server and all detailed instruction (as usual) is at the OpenSim website.
Good luck and have fun.