I'm always weary of any regulations about bitcoin. Nonetheless, it is nice to have a few regulated companies to buy and sell btc/usd from.
Of course, nothing is going to prevent a mt. gox like situation though.
I think AML/KYC are just excuses to keep the smaller ventures away from the main competition (monopoly anyone?). At times the rules and their rigidity can mean hindrance more than facilitating. Most times they just make it harder than ease your transactions.