This is lecture given in the series of seminars of the LongNow foundation.
It contains Brians perspective of the Long Now (and the Big Here), some discussion about his music and especially also his studies for a bell for the Long Now clock (see http://www.longnow.org/shop/prints-cds/bells-cd.php). He mentions how the long-term thinking is influencing his life.
Neat thoughts from the lecture:
It is available at their site as PDF and as recording (see http://www.longnow.org/seminars/).