I've been downloading the audio from Charlie Rose and NPR's This American Life and recorded books from audible.com for a monthly fee and from the local library system for free. I've spent hundreds of dollars over the years buying tapes and CD's from the Learning Company.
Now, I've discovered that Stanford University has a new service, originally targeted to alumni, to download faculty lectures, interviews, music and sports. All free.
I can hardly wait to explore it!