The ANSA news agency is quoting Premier Silvio Berlusconi as rejecting speculation that he will resign, telling aides that any such rumors are "without foundation." Barnes and Noble is making what it's calling a very special announcement this morning. Analysts expect the company will launch a new version of its Nook e-reader to compete with the Kindle Fire -- and, of course, the iPad. You know what's up? Warren Buffett's appetite for investment. His company Berkshire Hathaway invested $24 billion last quarter as markets wobbled. That was the most in at least 15 years.