Hello guys!
I quote: "We can now announce that the beta site will be opening from 15th - 19th September!"
So gear your ass up with beer and bacon and get ready for the 19th of September! Also if you didn't get a beta key just yet, there are a few left at: GameSpot UK
[EDIT]
Also the client will be downloadable during 15 - 19th of september as they stated on twitter: "We can now announce that the beta client will be opening from 15th - 19th September!"
They might've made a typo though since that sentence doesn't really fit well, beta client 'opening'? Weirdness. Anyway: stay tuned!
Regards,
Daniël.