So if I wanted to cash out 10,000 BTC where would I do that?

[reactive4ce]

Doesn't mtgox have a 100btc/$1000 limit per day

On withdrawals, yes. You can sell all your BTC at once, and then withdraw $1000 every day for a long long time.

Well the fees would be huge, and I believe if you did just few such right under $1000 withdrawals in one week, your account would be frozen and you would have to validate - you know these anti terrorist/laundering laws...

[casascius]

If I had 10k btc I wanted to cash out, I would post an offer to sell it in exchange for a wire transfer.  I'd offer a notarized agreement to deliver and to use an escrow of the buyer's choice.

This method works.  Done it in the past (when 10k btc was worth much less).