All depends on what you're looking for in a reading!For Mary Oliver fans, a reading in Seattle she gave shortly after her lifetime partner, Molly Malone Cook died:http://www.kuow.org/defaultProgram.asp?ID=10055I went to the Geraldine R. Dodge festival one year to hear her read, and was heartbroken to learn she was too ill to attend.
I look for someone with a good voice who can read well. I can name any number of poets who don't pass muster. In fact, poets who read well seem to be the exception. One of the best was Kenneth Patchen. I have never heard Mary Oliver, but it so happens I just happen to have found a CD of her reading 40 of her poems. So I'll take a listen