Reports of the demise of the interest-only mortgage appear greatly exaggerated. While the market is clearly slowing as a result of economic and regulatory changes and borrower preference, lenders nonetheless managed to make a bit of headway in the early part of 2006. Overall, an estimated $140 billion in new IO loans were originated during the first quarter of this year. That was up slightly from the estimated $133 billion in new IO loans that… [One data table included]