It is so nice to see that the idea behind DTube really works so far. Though DTube does not have any contend censure, you can usually find only appropriate valuable content. Plus content authors earn by far better than on Youtube.
I think the main priority for DTube creators is to find the way to keep this success in future. How to address the pressure about copyright issues, service abuse by scammers, etc... Not too much of those yet, but they will appear soon, as the service is growing fast!