Ask HN: What is required to hire myself as a contractor in the US?

I wonder what is required to hire myself as a contractor in the US? Background: I live in the UK and very recently I started contracting. I have my own limited company, bank account, accountant and annual tax returns to fill. If I'm doing this in the UK, I wonder if it is possible to do the same in the US? Say - establish Delaware corporation and offer services to businesses located in the US... I already have a tourist visa allowing me to stay for 6 months at a time... Has anyone got any idea? (all the feedback appreaciated) --- I was in the US twice already and I envy the culture of innovation and entrepreneurship. And obviously the weather in California is much better than in London :) Getting H1-B (official working visa) is a real hassle, but maybe the is a loophole allowing me to overcome it... Thank you in advance!