Norwegian relatives doing genealogy?

I have a general question: Does anyone in Norway (or any other country with the exception of the U.S.) have an interest in finding relatives who might have emigrated to the United States? In my genealogy research of the Vick, Mobeck and Ruud families, I would love to eventually discover that we still had living relatives in Norway. My grandfather, Lars K. Vick (Wik/Vik) and his brother Knute left their father, mother and sisters in Vestre Slidre when they emigrated from Norway to the U.S. in 1901. It would be great if a relative would also be looking for family over here. Does this happen often? Just curious! Thanks.