Downloadable music seller EMusic.com and Epitaph, a punk rock record label, have formed a partnership to promote and sell portions of the Epitaph catalog in the MP3 format. The partnership marks one of the most significant content announcements to date in the MP3 community. Under terms of the agreement, EMusic.com becomes Epitaph's exclusive Internet partner for promoting, selling, and electronically distributing Epitaph's catalog online.