Yeah. "Let's take that offline/out of the meeting" when someone talks longer than 1 minute (longer than 30 seconds if it's a larger team).

By the way, I was at a place that did XP, and one of the rules was that if there was a meeting, there had to be food. What that did is, if someone was talking too much, someone would ask them "Are you going to eat that?" That, um, gently if not subtly told them to stop talking so much. Also, it meant that we got to snack.