Market cap means little unless you want to buy a stake... or boast about what you are "worth"

Apple, Microsoft and the Market Cap Myth | BNET Technology Blog | BNET

It seems that the press has found this week’s Next Big Topic: that Apple (AAPL) surpassed Microsoft in market cap. In the U.S., it’s now second only to Exxon (XOM). Microsoft CEO Steve Ballmer essentially dismissed market cap as a measure of importance.