If you're not familiar with TTC (teach12.com), they're a business that compiles college lectures from great lecturers.  Sound boring?  It actually manages not to be; they're interesting, inspiring, and actually teach you something (not bad).  One more time: they ARE interesting, I promise :)

These are my favorites.  I'd listen to them all again if I had the month.
(and if you care, my favorite was "Great Ideas in Philosophy")

So get listening!  It's never too late to expand your education (or to practice pretentious intellectual affectation <-- get it?).

Anyway,

Fine Arts & Music
--Brahms - His Life and Music
--Mozart - His Life and Music
History - Ancient & Medieval
--Early Middle Ages
--Famous Romans
--Herodotus, The Father of History
--High Middle Ages
--Rome and the Barbarians
History - Modern
--History of the United States (2nd edition)
Literature & English Language
--Dante's Divine Comedy
Philosophy & Intellectual History
--Existentialism and the Meaning of Life
--Great Ideas of Philosophy
--Plato, Socrates and the Dialogues
--Will to Power - The Philosophy of Friedrich Nietzsche
Religion
--Fiction In The Da Vinci Code
--God and Mankind - Comparative Religions
Science & Mathematics
--Einstein's Relativity and the Quantum Revolution
--Particle Physics for Non-Physicists
Social Sciences
--Great Ideas of Psychology
--Perspectives on Abnormal Psychology

Thanks for reading and I hope you like them :-)

oh, and if the torrent-size is a turn-off, just set your client to download the ones you want, I won't be offended ;)