I have played Alpha 2v2, and it was amazing because I reunited with Jacob (my Irish friend :-D) in a 2h killing spree, so Beta is for sure next in line. If you do not know yet, SIE announced 2 weekends for testing the upcoming game, and also the fact that all PlayStation 4 owners will be able to play the beta for free.
The schedule is like this:
12th-13th September – only preorders
14th-16th September – all PS4 owners
19th-23th September – all PS4 owners
More details here. Please note that a PlayStation Plus membership is required. Just open the store from your PS, it will appear all over your screen. I was unable to download it (they say I already have it), but I think it is like this because of the Alpha. I will let you know.