Both are outside the U.S. and not subject to Fincen regulation. Mt. Gox is having a different company deal with their U.S. customers for transfers into/out of the U.S. and they will handle Fincen.
I doubt BTC-e will ever register. There is not even stated actual physical address for that business or the domain registration. The registration contains what appear to be fake phone numbers.
That's interesting to know. Wonder if any CNN anchors would care to interview the kind folks at btc-e?