Seriously it exists, google isn't a dirty word... Oh wait for many it is, nevermind.
Anyway the information that isn't there:
None were tested during the beta so expect them to be unbalanced, possibly buggy and broken on release (my opinion). But since you don't know then I expect you probably haven't aligned to a power yet and won't get access for 4 weeks from when you do align.
Did I see somewhere that essentially PP means you would be limited to the one weapon that belongs to the faction you are aligned with? (unless you defect?)