Some that know Cuba say it won't take any business. For example McDonalds. They want to know what McD will do for Cuba. "We'll sell you obesity and heart attacks". Next...
The obvious company's like John Deere for their agriculture, Caterpillar for building needed infrastructure might be easily accepted. All this from a NYT's article today, which you probably read.
Funny how the subject is not so heavily debated politically on the forums. But most of them have War Rooms and the like, those are probably buzzing.