The Speech Accent Archive is a fantastic tool for anyone who wants to learn about accents. It has speech samples of hundreds of people--whose native languages range from Afrikaans to Zulu--speaking the same paragraph. (It also has some pretty fabulous information on the phonetic inventories of all of the native languages covered in the Archive!) It's very interesting to hear the many different people with their many different voices speak the same words.
I highly recommend that everyone spend some time looking through it. It's a lot of fun, even if you don't have any knowledge of or interest in linguistics!