online esl/ssl tutoring

I belong to this bi-national intercollegiate group called the Border Colleges Consortium. I am a student ambassador to the org. and attend conferences throughout AZ and MEXICO. at the last meeting, several students expressed interest in starting an interactive website for English as a Second Language and Spanish as a Second Language tutoring. That way, students of both heritages can simultaneously use their own language skills to assist others, as well as gain proficiency in a second language. INCREASING bilingualism, multinational interaction, friendships, knowledge, understanding. Good stuff. I will keep y'all posted with the progress, and if anyone knows of a Linux-ish alternative to Myspace or some kind of group-hosting software (free is good) that is non-coalition corporate, please let me know.