For a while I have been annoyed that mtgox is restricting how much LR we can withdraw from our accounts to $1000/day. I have emailed and explained that LR and BTC should not be subject to US banking regulations and even if he wants to play it safe the quantity for cash withdrawls before a currency transaction report (CTR) is $3000 not $1000.
The $1000/day limit is quite normal and expected, if you do not wish to register as a Money Services Business (MSB) with FinCEN.
I found this guidance
while researching for The Bitcoin Store.
For the sake of mtgox.com's longevity, I hope this withdrawal limit remains. You do not want the US government to even mistakenly shut down mtgox, do you?
And I for one would not trust random users' interpretation of US laws. You will find crazy people who will explain that it is not required to pay US taxes to the IRS. We all ignore these nutters, continue to pay our taxes, and continue to stay out of jail.