yes, Rick got it right. i was steaming ahead and pulling it into 7.2, but then realised he's putting in a permission matrix (7.3) that will probably be very nice for us to import INTO. (yes, giz even global moderators too

)
fusionBB 2.1 has such a beast, albeit it won't be as nice as Ricks (yes i'm biased)

sooooo, i screeched the brakes on it for now and am trying to coincide with 7.3 or just after 7.3 (ie wait for it to settle a bit).. the importer would be affected by using bitwise or'd permissions or tinyint(1)'s for example..
then we should be able to go fbb2.1 --> ubbt7.3
one thing they have is that famous salty password, so i'm not sure if we won't force users to have to initially re-set their psw to get it going..
now, one thing i thought of.. was just to salt the psw's the same way in 7.3 (would affect upgrades) and *poof* done.. looks like fbb does their salting the same way that vbulletin does.. (just a random muse there)

bottom line: i'd call this baby percent complete at 65.34% (kidding) it's about 60/40 right now..