Got a response from the admin at Yahoo PublisherÂ (see I told you the customer service is good) about the program being out of beta:
Golly, weâ€™re sorry, but weâ€™re not out of beta yet. Weâ€™ve just launched a new home page to link up you publishers â€” whether youâ€™re in the beta or not â€” with all of Yahooâ€™s publisher tools and services. Thereâ€™s lots on offer there, so we hope youâ€™ll take advantage of them – – M2, Head Blogster (Admin)
So it may not be out of beta, but it has new tools and services everyone should take advantage of.