It seems like who has access to what and when isn't all that clear among the community. A negative consequence of Square-Enix's efforts at being fair and honoring commitments has resulted in a complex set of conditional requirements and benefits. I've outlined those below based on your status and desired platform. Please let me know if any of this information is inaccurate or unclear and I'll do my best to fix it!
PCLegacy SubscribersYou're in this category if you paid for 90 days of sub time for 1.0. You should have received an email and can check your status by following
these instructions.
You Get: Access to all phases of beta without even applying.
FFXIV Owners / Non-Legacy SubscribersYou've bought FFXIV at some point and have registered it to your Square-Enix account. I don't think they're accepting new registrations any more, so you'll have to wait until ARR releases to register your game if you haven't.
You Get: Access to phases 3 and 4 without even applying. You can apply for a chance at phases 1 and 2. Your alpha application counts for beta.
Other FansThis is everyone else, including those who have FFXIV but never registered their copy.
You Get: Access to phase 4, which is open beta. Some will certainly be selected for beta access earlier, as was the case with alpha, so do apply!
PS3Holders of a code from FFXIIIFirst-run copies of FFXIII for PS3 contained a code for priority access to the FFXIV beta. Since this is the first time the PS3 version will have a beta, it counts!
You Get: Priority access to the PS3 beta in phase 3 if you provide your code with your application.
Everyone Else (Legacy, Non-Legacy, Whatever)Everyone else has to submit an app for the PS3 beta. Doesn't matter what your status was.
You Get: Nothing! Apply if you want to be in the PS3 beta.
Bonus Section - Do I Need To Apply?
PCI applied for the 2.0 alpha test, and was selected. No.
I applied for the 2.0 alpha test, and was not selected. No.
I did not apply for the 2.0 alpha test. Yes.
PS3I applied for the 1.0 PS3 beta test and was selected for the 1.0 PC beta test. No.
The above condition doesn't apply to me or doesn't make sense to me. Yes.