Have you checked out mormonchannel.org? They don't exactly do scripture commentary, the closest thing being a few Scripture Stories series aimed at children where "Each episode features children sharing their insights from and favorite experiences with the scriptures, along with music and readings of great stories from the scriptures." But they have live talk and music streams as well as quite a few Audio series that you can listen to at any time, including Stories from General Conference, Why I Believe, Perspectives on the Prophet Joseph Smith, and His Grace In-Depth.