I'm more concerned with if we are not getting into the beta, how long will we get access to the 1.0 game?

We have been told that 1.0 will be up through the alpha. so I'm guessing that the alpha is closed beta 1.
I'm thinking that the current game will be up through closed beta 1, when closed beta 2 starts, it will be taken down so they can transfer all the characters. then at open beta we will have our characters in the new world and the open beta will be like a long head start event. I hope that is how it will work. all the legacy will probably get into closed beta 2 as that will be more around the point of major stress testing.