IANAL either (although I do date one), and I too have heard of these things. I think they are called E-2 visas. They require you to raise or invest around $100k in a US business. The lawyer who told me about the E-2 was quick to warn that the applications get scrutinized hard. It sounded political, vaguely sketchy, expensive, and complicated.

it's kind of complicated, whatever process you choose. email me at [email protected] if you want help. I'm from sweden and our company got funded by Y Combinator in November.

Assuming YC money are not enough to get someone a green card, I suppose meaning you can't get him incorporated, would you accept someone who could spend his own money the first 2-3 months while being part of YC 2007, so that in the case of helping him getting more funding enough to get the green card, you get also your percentage?

You don't have to be a US citizen or resident to own a US company.

yes. if you have $1M to invest in the USA, you can get an automatic - and almost immediately - green card. (my green card took 4 years and $5K to get).