Wolff's reading starts at 42:51, but the entire show is worth a listen.
Here's the link to a YouTube video of Sexton's "All My Pretty Ones." http://www.youtube.com/watch?v=t3tUtgKqsqs Below is another of Sexton's poems. Both are great performance examples.
These are all great performances by actors of short stories by famous writers. Give em a listen.
Same deal as above but it's poetry this time instead of short fiction. Great stuff.