I also have the same Beta stuff with a different assignment named "Retire Early".
I guess they are providing all new assignments starting this month, as these are new assignments they cannot decide on passing marks yet same as with all Beta exams from Sun/Oracle, so they are going to analyse results of all these new assignments and then decide upon passing marks, hence called Beta.
I also checked if oracle launched Beta Architect exam for
J2EE 6 but cannot find anything on oracle's site.