When I mention to someone that I have an interest in Luxembourg genealogy, the Luxembourg-American Cemetery almost always comes up in conversation. It doesn't relate directly to what I do, but with family members who fought in the Battle of the Bulge, I do find it important.
There are a few good resources online to help you research family members buried in the Luxembourg-American Cemetery. The American Battle Monuments Commission has a searchable database designed to help locate burial sites. To search, you enter the name in the blank. You also have the option of searching by unit or cemetery. Visitor information is also available on their website.