MyGengo, a low cost translation company recently published a report covering the state of affairs in the language learning industry for 2009. Some of the interesting points and statistics revealed is as follows:

Chinese, Spanish and English represent only 30% of the worlds spoken language by population. But these languages make up roughly 60% of the [...]

Despite being in early development and only currently supporting Mandarin language, Lingt.com had a review of their language learning website written up by techcrunch and saw their traffic jump a huge amount.
 
Right before the article, Lingt had an Alexa ranking of  3,245,881. One week later, it plummeted to 388,600. The lower the Alexa ranking the more [...]

Here is a list of language learning websites and their alexa ranking, indicating the relative amount of traffic each site gets daily. The lower the number, the more traffic.
livemocha.com = 4,080
englishtown.com = 5,769 (english only)
smart.fm = iknow.co.jp = 13,540
italki.com = 14,361
wordie.org = wordnik.com = 31,127
quizlet.com = 31,766
edufire.com = 32,228
babbel.com = friendsabroad.com = 46,163
lang-8.com = 47,548
mylanguageexchange.com [...]