The ad isn’t all that exciting, but I thought the slogan under Baden-Württemberg was great. “Wir können alles. Außer Hochdeutsch.” Roughly translated it means, “We can do everything. Except High German,” obviously a self-deprecating comment on their regional dialect/accent.
Update: Dexter tells me this particular slogan was in fact offered to Saxony first, but they turned it down over fear of being made fun of.