Currently used to designing websites, when I found out about this in class I was so excited. The only problem I found was that I wasn't sure what theme to make it as most of them follow a certain style but I guess that's down to myself.
Due to the massive amounts of spamming going on right now I think there should be some sort of chat room system on there which allows you to create a room and send the link.
Or you could even follow a similar idea to Omegle by pairing two people together but make it so it pairs two people who speak in different languages?
I remember looking at a site that were planning a Mars mission and they expected you to pay in order to go on it. I have no idea why anyone would pay to be stuck on Mars..
Some fantastic designs produced by it though.