If you're interested in learning a language in '07, iTunes has a whole section of podcasts devoted to language.
To get there, just head to the iTunes Music Store, then go to Podcast -> Education -> Language Courses. You can get started perfecting your Spanish, French, Chinese, Japanese, Russian, or Italian (to name some of the most popular) in no time, and best of all, they're mostly all free. If you've gone down the language-by-podcast road before, let us know your favorite language podcast in the comments. Thanks Erynn!