Fifteen billion smackers: That's the value Microsoft recently slapped on Facebook when the computer giant invested $240 million for a 1.6% stake in Mark Zuckerberg's online social-networking site.
You could seethe with envy--or you could chase your own fortune on the Web.
Some online businesses require only a few hundred dollars in equipment, while others demand significant hardware and perhaps even a warehouse. Some might make you rich; others might just cover beer money. And all involve various levels of time, capital and technological skill.