Is Facebook Really Worth $15 Billion?  Maybe not. Microsoft's
$240 million investment in the wildly popular social networking
site is turning heads, but some insiders describe the valuation
as "ridiculous." An inside look at the deal -- and what it means
for the tech industry.   Is Facebook Really Worth $15 Billion?
The business world is still buzzing about Microsoft's $240
million investment in Facebook -- a 1.6 percent stake which
places the wildly popular social networking site's total value
at around $15 billion. Quite a coup for 23-year-old founder Mark
Zuckerberg, the Harvard dropout who reportedly turned down a $1
billion offer just a year ago.  The deal may give Microsoft a
leg up on rival Google, another Facebook suitor, and is no doubt
a stamp of approval for Facebook, which still has a relatively
unproven revenue model. But skeptics say Facebook, in reality,
is worth a whole lot less.  So what does the move really mean
for Facebook and other tech upstarts? Will the site
revolutionize the Web, or