  We discuss observations of the submm-selected galaxy, SMM J02399-0136, and
what has been learnt about it during the year following its discovery. SMM
J02399-0136 was the first distant galaxy detected in submm surveys with SCUBA.
Its association with a massive, gas-rich starburst/AGN at z=2.8 has lead to
suggestions that the prevalence of AGN in the early Universe may be high and
that these AGN may account for a significant fraction of the far-IR background.
