Haha - I actually have been, they're fast on the reply to emails
Long and the short of it is that they're now considering it, but likely in a year or two as they're too busy with the 308 - they've halted almost all other projects and are ramping up production. Rick mentioned that in the past it simply wasn't possible or economically viable (more than enough demand at home, so why cut into profits by having to get licenced to export?), but now they're interested in selling outside the US. Likely time frame is 1 year + before they even have the time to start dealing with exporting... however in his words "we would love to sell outside the US" ... so that's looking up
Yep - they were pricey as all get out - in the 8-10k range! Also heard they had various mechanical issues too.
The SMG guns are different than originals and SSD models - milled 4140 receivers instead of stamped, chrome lined barrels, stainless gas pistons etc etc. Externally identical, internally upgraded

Also the 308 uses M1A mags