I would second wine as a possibility. Though bottles are heavy, Oregon wine is (in my experience) all-but unavailable in France and would consequently be a curiosity. A couple of good pinot noirs would go over well, as it's similar to red wine from Bourgogne. A few weeks ago my wife and I gave a bottle of California cabernet sauvignon to a couple in Paris who had done us a favor, and they were very happy with it. They were having a family gathering the next evening, and after thanking us told us that we would be there with them (in their thoughts, at least) as they enjoyed the wine.
Chocolates are also a common gift for visitors to bring, so consider a few boxes of Moonstruck chocolate -- I suspect that would be well appreciated.
In addition to Marionberry jam, strangely enough apple butter generally is unavailable in French grocery stores (at least in my experience) -- I've only seen it once, at a small craft market I stumbled across one weekend. It was made by a family enterprise in a little place called Savigny Poil Fol, located about midway between Mâcon and Nevers -- it's called pâte à tartiner pommes-cannelle. If you can locate some good, locally-made apple butter, maybe from Hood River, that might also be something unusual and probably would be well received.
Lastly, a few Pink Martini CDs might be appreciated. The title track of their first album Sympathique was a minor hit in France and I've heard it and Amado Mio, another track on that album, from time to time in France. The French seem to love them -- I attended their concert in Lyon last summer and it was packed, ending up with a substantial fraction of the crowd dancing energetically in a l-o-n-g conga line that snaked across the stage, down the steps, and into the auditorium's aisles. I wouldn't be surprised if (1) some of your friends and family would recognize the song Sympathique, and (2) they would be amazed to learn the group that performed it came from your hometown.
