We've run into a couple of annoying problems that have delayed the release. We expect to resolve them within the next few days. Believe me, we are itching to release this thing and are doing our best to do so.
The new server itself already supports domain users and server-specific users (i.e. users without a corresponding Windows account), but since this first beta will be using the management GUI from the old edtFTPD, these features will not actually be exposed, so for now the answer is no.
- Hans (EnterpriseDT)