IBM in talks to buy Sun Microsystems: sources NEW YORK (Reuters) - IBM is in talks to buy Sun Microsystems Inc, sources with knowledge of the matter said, a move that could bolster the technology giant against rivals in the high-end computer server and software markets. UBS says had 47K accounts for Americans WASHINGTON - UBS AG now says it had about 47,000 accounts held by Americans who didn't pay U.S. taxes on their assets, but Switzerland's biggest bank is providing the names of only 300 American clients to the U.S. government in a showdown over secrecy. UBS official to face Senate questioning WASHINGTON - An official of UBS AG on Wednesday will face questions from a Senate panel for the first time since Switzerland's biggest bank formally acknowledged responsibility for helping tens of thousands of American clients hide assets from the U.S. government.