Not as much as he was a year ago, it seems.
Forbes magazine has just published its annual list of billionaires and, horror of horrors, the 24-year-old Facebook founder has disappeared from the rankings.
Last year, according to Forbes, Zuckerberg was worth a cool $1.5bn, making him the world's youngest self-made billionaire. These days, thanks to the bursting of the internet bubble – and pretty much every money-related bubble around – he's dropped off the list completely.
Forbes doesn't say precisely how much he's worth these days – but he's obviously lost at least $501m.
Why the drop?
Well, perhaps he should have never been on the list at all: after all, Zuckerberg's wealth was almost entirely virtual anyway, and not just because it's been made on the internet.
His theoretical billionaire status was based on slim information about the amount of money being pumped into Facebook, and in particular Microsoft's decision to splash out $240m on a tiny slice of the company.
Plenty of people took the logical-but-ludicrous $15bn valuation as gospel, but thanks to the company's involvement in a lawsuit with Zucerkberg's Harvard classmates, we already knew that Facebook valued itself far lower than that – at least when the courts came asking.
Now, Forbes admits, "it's hard to imagine the privately held company being worth nearly as much as it was a year ago".
The cherub-cheeked CEO isn't the only famous technology industry figure to get kicked out of the billionaires club, though. As the Wall Street Journal points out, two legendary venture capitalists – Mike Moritz and Arthur Rock - have also been ejected, as their wealth sank with the financial markets.
Still, Zuckerberg can console himself with the fact that, according to Forbes, he's still a "youthful multi-millionaire". Perhaps he can discuss the trials of coping with such a downgrade when he goes on Oprah Winfrey's show. Yep, it's a hard life.
