From what they've said, you SHOULD be getting into phase 3 at some point. Keep in mind that things are subject to change, so hopefully you've applied for beta rather than expecting an invite.
To answer your second question, your 1.0 software is no longer any good. 2.0 runs on an entirely new engine, and as such the beta and release clients will be new software.
This is my sig; Enjoy.
FFXIV: Tom Carroll - Excalibur
FC: Sitzkireg (www.sitzkrieg.guildwork.com)