I've also traced many of my maternal grandfather's family back to Alsace, specifically to Wissembourg. The emigrated to the area in and around Odessa, Russia in the late 18th or early 19th century, before immgrating to North Dakota in the 1850s and 60s. (Sorry, I don't have my records at hand for the exact dates.) There were a lot of Jacobs and Gabriels and Sebastians in my family, if that means anything.
I'll be visiting Wissenbourg just after Christmas.
Feel free to e-mail me if you'd like to exchange family info.