for those who wondered why IB did something, and ameritrade/datek didn't do it...
http://reuters.com/financeNewsArticle.jhtml?type=governmentFilingsNews&storyID=3258089
"The National Association of Securities Dealers in a preliminary ruling said Ameritrade and units Datek Online Financial Services and iClearing violated securities law when they allowed traders to use the proceeds of stock sales before the cash was in hand."
http://reuters.com/financeNewsArticle.jhtml?type=governmentFilingsNews&storyID=3258089
"The National Association of Securities Dealers in a preliminary ruling said Ameritrade and units Datek Online Financial Services and iClearing violated securities law when they allowed traders to use the proceeds of stock sales before the cash was in hand."