If you want more info on OwnCasino, go to the OPA's site on CasinoGazette.com. Specifically, the following two URLs:
The OPA calls them Elka systems, 2K Systems hasn't used that name in years. 2K owns OwnCasino.com, and their casinos use software from Avesta Design in Russia.
On OwnCasino's side, I must report that they went to the OPA and asked them to test their software to get if off the blacklist.
Re hosting overseas: Gaming servers have to be hosted overseas, but web sites... probably not. Many online casinos have their web sites hosted in Toronto, but I believe some RTG ones have them hosted in the US, and haven't had the sites taken down. You must distinguish between the web site and the gaming server. In Own A Casino package 1, they're just giving you a website. The casino people download talks to a gaming server in Antigua or someplace, so you probably don't have to worry about where it's hosted