Yeah to be honest I don't understand what these Guess Passes do when anyone can download the starter edition. But again, as of right now you can't install the game until the 14th
You cant use the starter edition until 30 days after release, UNLESS you have a guess pass, so thats why =D
On our front page, newst post, is the link to the EU client
http://eu.media.battle.net.edgesuite.net/downloads/d3-installers/589acdb4-c660-318a-b993-01528fad7da6/Diablo-III-8370-enGB-Installer-downloader.exe
or if you are in us
http://us.media.battle.net.edgesuite.net/downloads/d3-installers/589acdb4-c660-318a-b993-01528fad7da6/Diablo-III-8370-enUS-Installer-downloader.exe