3 new language-learning websites

These are new style language-learning websites that are trying to leverage community and/or new capabilities allowed by the internet:

• SpanishSense –they have podcasts,PDFs,daily emails and a lot more. This site has been done by the same people who have been doing really successful ChinesePod for several years now. It looks very slick.
• LiveMocha –they are doing social network style language learning. Others have done it before them,but LiveMocha seems to be a bit stronger on multiple modes of learning than other similar sites. Of course,building yet another social network is a pain and will be limiting factor.
• Mango –This website is an invite-only beta,but my invite arrived less than 30 minutes after registering. They have lessons for a number of languages,but the lessons themselves are in a power-point style presentation. I guess they hope that nice presentation will make up for somewhat inflexible format. And of course,they are still beta.

Among these three,my money is on SpanishSense. I feel that trying to do too many languages at the same time,means none will be done right.

It is true that internet allows to leverage Long Tail effect and create a super-niche website (with a niche per language),but I do not see how one company would have enough time and money to support all those niches well enough. This is my main annoyance with the WordChamp,which I quite like otherwise.