Howdy, I'm the one that told Bert that the exam was in beta -- I thought we were talking about the Developer exam! Anyway, Marcus is right, the 1.4 exam is definitely available, although still being translated into other languages.
As for weighting, I'd look at the Language Fundamentals objectives and the Flow Control, Assertions, and Exceptions objectives in particular, but really, nothing is favored too heavily over anything else. But if you don't know the Language Fundamental questions really well, then questions from other objectives will be tough.
There aren't a gazillion
thread questions, but the ones there are pretty challenging
Have fun
-Kathy