I'm assuming this is more of a bug than a feature request.
We can no longer create segments that filter traffic to Paid or Natural Search because the "Paid Search" dimension is no longer available in the dropdown box.
Even sillier, the pre-configured segments still exist and work properly.
According to ClientCare, this isn't just a bug for me, but for all SiteCatalyst users.
Please bring back Paid Search as a dimension