Mark Goodacre has posted his next installment of the NT Pod:
NT Pod 37: What Is the Purpose of the Epistle to the Hebrews?
What I found most intriguing in his discussion is that he views Hebrews as a kind of circular letter developed out of a sermon. He thinks the exhortations in the book are much too general to be targeted for just one audience. I am not fully persuaded by this as there are places where he appears to know the situation of his audience (e.g., 5:11-12; 10:32-34; 12:4). Also the author expresses a desire to be restored to his readers (13:19) and they have a common acquaintance in Timothy (13:23) and he sends greetings from those from Italy. All this suggests to me that the audience is more specific.