This is good idea. I thought about this before and got stuck. Actually i thought it would be a bigger scope, like all kinds of tutor, not just language learning. The problem i had (have) is what should be business model. Natually we could charge learner and pay the tutor and we only provide a platform for people to find people. However, i think once they find each other, they could go bypass our system and deal directly. Have you thought about the business model.