Did Microsoft make a bid (to the tune of $80 billion, or otherwise) for Yahoo? Microsoft CEO Steve Ballmer flat-out denies the rumor in an interview last week with the IDG News Service. But he doesn't deny that the two might be seeking new ways to cooperate, going forward. Another interesting tidbit from this interview: About 30 percent to 40 percent of Microsoft's business is currently from "consumer" sales. The rest is attributable to business/enterprise revenues.