Check out these design-related podcasts, a free subscription from the iTunes store

Design Matters | With Debbie Millman

AIGA Chapters

San Diego
Jacksonville
Nashville
DC

NEXT Design Conference

Command X
Community Convocations
Student Symposium
Affinity Sessions

SVA: School of Visual Arts Designer as Author

Paul Rand Lecture Series
Thesis Projects
Guest Lectures
Student Coursework

Public Radio International

Design for the Real World
Science & Creativity from Studio 360
Arts & Entertainment 

Design Community

TEDTalks (audio)
TEDTalks (video)
TEDTalks (HD)
Boagworld Web Design
Design*Sponge
ETSY