The challenge with the US is that all talk of immigration focusses on illegal immigrants, rather than highly skilled and educated immigrants.
It's unfortunate that the Obama administration won't separate these two kinds of immigrants since they fear in doing so, they won't be able to get comprehensive immigration reform passed.
Other countries recognize the value of highly educated immigrants who want to create companies. Canada, for example, just announced it's startup visa specifically targeting immigrants who want to move to the country to start a company.
http://www.theverge.com/2013/4/1/4170022/canada-startup-visa...