UPDATE: A roundup at Syria Comment.
Saudi Arabia has recalled its Ambassador to Syria, saying Syrian actions are unacceptable to the Kingdom. Kuwait and Bahrain have since followed the Saudi lead. This is fairly important I think, since the Kingdom supported Ben Ali and Mubarak to the bitter ends. (Libya was another story, but there is personal bad blood between Qadhafi and the King, so there was a getting-even element there.) King ‘Abdullah has personal ties with Syria, so his move is a sign the Saudis are very uncomfortable with the course of events there and possibly cutting their losses.
It may not deter Asad, of course, but it's a pretty interesting signal.