[Edit: I'm in, on Besaid server.]
"Along with the completion on investigation and correction of the critical issue, we have decided to begin FINAL FANTASY XIV Open Beta Test on Sep. 1, 2010 at 19:00 (PDT).
Starting on Sep. 1, 2010 at 19:00 (PDT), acquisition of registration code required for FINAL FANTASY XIV Open Beta Test will be available.
We are looking forward to your participation in FINAL FANTASY XIV Open Beta Test!"
Taken from http://entry.ffxiv.com/na/index.html - go to http://entry.ffxiv.com/ and select your region for relevant information.