VoxSwap matches up people who are trying to learn new languages. For example, if you speak English and you’re trying to learn German, then VoxSwap will match you up with someone who is German and is learning English. The site then lets you e-mail each other and talk over the web.
VoxSwap also offers other language tools including a virtual keyboard which supports multiple languages and characters, auto-links to Google Translator and news feeds in multiple languages.
FriendsAbroad offers a somewhat similar service.