Microsoft, usually a source of software patch updates and claims about Vista adoption rates, produced a bit of sentimental news this week as Bill Gates stepped away from his daily corporate duties on Friday. Gates, who founded Microsoft at age 19, will now devote his time to philanthropic work. Yahoo, a perennial name in this space, defended its Google ad deal on Wednesday and the next day launched yet another reorganization. Finally, Oracle wants at least $1 billion from SAP due to infractions supposedly committed by a subsidiary.