VIKI, the personal assistant app for BlackBerry 10 has updated their site, the app is still not available quite yet. One of their dev members had previously told me they were aiming for a February 28th launch date, however some small issues with the app were still ongoing so they were still cleaning up the code.
Based on my understanding VIKI will be a subscription based personal assistance app, if you visit their page they have a signup page where you can enter your e-mail to get the app/subscription for free when it is released. Visit their page here.