Barring marriage, how can one move to the US? I've been looking into it and the E3 visa for "skilled, professional and unskilled workers" is for Australian citizens only.

I'm asking for a Belgian citizen that can speak English, French and Flemish fluently and has two bachelor degrees... one in computer science/programming and another in 3d graphic arts.

The hoops one has to jump through to become a citizen in the US are numerous and I would like to know if there's anyone out there that managed to make it work for them.