Via the Continental Celtic language list, I've learned that two new Gaulish-language tablets have been found in the city of Chartres. This is quite exciting--really, any new finding of Gallo-Brittonic, anything that can fill in the gaps, is worth celebrating.
P-Y. Lambert will be publishing a study on it soon; this article looks like a preview (unfortunately, I read it through Google Translate, because my French is pretty terrible). It's largely a list of names, and aparently might be a defixio, which is a magical curse tablet.
Here's a video--in French, unfortunately, but the only one I know of--about the new tablets: