A podcast of a recent talk I gave at the annual week-long Limmud Conference in England is available here. I'm afraid I can't vouch for the intelligibility of the recording (not to mention the content). Here's a brief description:
Jews who reject Jewish religion and its ‘covenant of faith’ can nevertheless be accepted as being bound to a ‘covenant of fate’ and a common Jewish identity. But what about the converse? This session will explore the fascinating stories of individuals and groups, from sixteenth-century Russians to contemporary Africans, who adopted forms of Jewish practice and belief without conversion or even contact with Jews. How does this recurring phenomenon challenge our assumptions about Jewish identity?