Another senario for the lack of PR might be
that if (and that's a big doubtful if) the launch and/or the software has a problem that they feel needs to be fixed before releasing it to the public, there might be a necessity to induce more financing. As much as they don't want to, they might have to. And because there is always that possiblity, they don't want to lie to us shareholders.
Remember, we (the longs and people most in contact with company) believe Paul and team to be a highly respectable and honorable group. Saying that it is done but then having to turn around and issue more 504's due to some unsuspecting problem would only bring more hesistence to accept their creditablity. Knowing that, Paul has told us the best way he can without making it 'official'.
My guess would be that once the revenues start coming in and there is no more doubt about needing additional development costs, there will be a PR. There would be no reason not to.
JMHO