Good answers from Dana and Jarie already... There is another aspect that comes to my mind, it's one thing to incorporate a company without visiting America, it's another thing to perform day to day management without visiting.
If you incorporate in USA without going there, then you'll most likely need an accountant, maybe a chartered accountant, and some sort of office address or local presence. If you're never visiting, then you need local providers to perform these services for you -- and you'll be 100% dependent on these providers. I'm not saying they will outright defraud you, but just that there is lots of potential for misunderstandings and less-than-ideal solutions when you're never meeting face to face.
One more thing; I don't know anything about US VAT laws (Value Added Tax, Sales Tax), but is it worth considering if/how this will impact you if you're registered in America?
create a company in the US so I can receive payments from there
International payments are fairly easy nowadays, thanks to credit cards. If you're worried that Americans will be hesitant to do business with a company in Colombia, that may be a legitimate concern. But can't that be solved by doing business from a business-friendly nation in South America or elsewhere? Perhaps a better question to ask the US entrepreneurs here which countries in South America and adjacent areas they're most comfortable doing business with?