Not all podcasts are about music or movies. Some you can actually, well, learn from. Case in point: the Learning Mandarin Podcast. Forget language courses on CD or books, just download a lesson and practice your Mandarin via iPod. Your podperson, er, teacher, textbook-author April from China gives helpful tips and and info. Download her podcast episode on simplified vs. traditional characters, and you'll feel oh-so-worldly in no time.