I love this idea and believe that your desire to bring together youth of differing backgrounds is much needed. It is very hard to learn about each other and understand differences when there is no interaction. Debate also gives people confidence and better public speaking skills.
I think this is great! We have very similar projects, stemming from the idea that youth get into trouble when there is nothing to do. Boredom is an issue for lots of teenagers, but the type of trouble availble to get into when bored in innercity neighborhoods is typically more detrimental than affluent areas. You should definitely check out my project Exposure!