Our priest extends to the parish the discretion to eat meat on Thanksgiving.
For me, growing up it was always my favorite holiday, even more than Christmas. Just a simple service of gratitude at church, hanging out at home with lots of good smells, hearing bits of relaxed conversation among the adults around the house, a great meal, good time with family members and all those great left-overs for the next couple days. For me it was magical.
Now I am older and my kids don't usually get home for Thanksgiving, so it is not as special. They come for Christmas, but I find emotions much higher at Christmas and all the pressure of gift-giving/receiving.
I am very grateful for my country and the freedoms it provides. I am also thankful for those founders who came here to establish religious freedom. It was an innovative and historic break from the the monarchial politics and government supported churches of both the east and west.
The reason we have the jurisdictional mess here in the US is because this land was a safe haven for those Orthodox people to come to where they could find better prosperity, flee despotism (in many cases) and have the freedom to practice their religion and keep their traditions.
So I think Orthodox people in the US should observe Thanksgiving day.