We knew earlier that Microsoft and Yahoo! were talking again, and now reports indicate that a deal is all but done. On the other hand, the companies have been oh-so-close to a deal before, and until the pen is placed to the paper, the deal can still fall apart. The deal would be what has been hinted at for months: a search advertising deal, and not the full-blown acquisition of Yahoo! that was proposed by Microsoft in early 2008, and quickly rejected by Yahoo! Both Bloomberg and Boomtown cite unnamed sources