The SSL thread indicates that YYZ reopened yesterday, but the SS website still says: Our BMW Chauffeur Service will be temporarily suspended until further notice.

A post in the SSL thread does say "in the coming days we will restart our Air Canada Signature Chauffeur service in Toronto"

Moderator note: new thread created in light of the resumption of the service and new partnership with Porsche. - Adam Smith, AC Forum Co-Moderator