What are the presidential candidates worth?

I found this fascinating from this month's Kiplinger, on how the presidential candidates invest. Their list of the candidates' net worth:

1. Mitt Romney $190-$250 Million
2. Rudy Giuliani $18-70 Million
3. Hillary Clinton $10-50 Million
4. John Edwards $30 Million
5. John McCain $21-32 Million
6. Fred Thompson $2.6-8.3 Million
7. Barack Obama $456,000 to $1.1 Million

It's interesting, not only how rich some of these guys are, but also how much Obama is worth. He's not really running as a populist (having read his book, he seems to bill himself mostly as a good politician), but he could probably stake a more legitimate claim at that than rich guy John Edwards. I know plenty of people who are worth more than Obama, and I will probably be in his ballpark when I'm his age. I don't know if he's the best candidate for president this go round, but there are an awful lot of things I like about him.
And man, Romney is stinkin' rich (he's a former venture capitalist, funding, among other things, Domino's pizza).