There is no release date yet for ISPConfig 3.0.5. We are curently testing the beta and fix the remaining issues that are listed in the bugtracker, when the issues are fixed, then I will release a 3.0.5 RC.
ISPConfig versions get released when we feel that they are stable enough for production use, it will help nobody if we will release unfinished software just because we set a release date on day X.
If you want to use 3.0.5 right now, the download it from svn 3.0.5 stable branch and install it, this would be the same as if we said release date is today. You get the software will all issues that are not marked as closed in the bugtracker at the given date.