The complex is answer is in how we do this. This effects every decision that we make, from design of the user interface to the number of player character models. As far as scripting documentation, we are still planning on posting this before we ship. Noel is currently bussily adding commands and events on a dailly basis and is preparing documentation as he goes. Rob and the other designers will make it, ahem, readable by humans before we release it.
Items are fully transferable for one server to the next.
If you build it using the toolsets standardized effect library, it will transfer over without any problems. If you give it any special abilities through scripting, however, these won't carry over unless the two servers have the same scripts running in their modules. Not sure what has been said, but no. Many things are still in flux and we don't want to give out to much invalid information. We would more rather get it right and then provide it in a final working state.