I just created a Voki. I was able to create an avatar, access text to speech software, and choose the language.
The possibilities here are endless. A foreign language teacher can record her voice and have students log on, listen, and practice at home. She can also get students to create their own Vokis and use them to assess where students are doing well and where their students are struggling.
I plan to play with it a little more and love the idea that an educational version is on its way.