What is ALL this X1 biz about?

I have been away for a few months but I have noticed some posts and threads about a company called X1? They claim to have an unoffical ADDON for SHIII with a Pacific edition? How is this possible without the SDK? I thought the SDK was off-limits for this game completely because UBISoft may use it for THEIR POSSIBLE ADDONS and EDITIONS? So how did this small company get hold of it if they did? If not, how is it even possible for them to SELL anything to ADDON or enhance the game further? Did they get premission from UBIsoft or something? That doesn't make sense!
Thought a few months back the combatplanes.com team got into some hot water about this issue, so I am just wondering how this X1 company is able to package a product and sell it off as an ADDON for Silent Hunter III. Something seems wrong here!!! :hmm:

When is this ADDON suppose to be released and for how much is it selling for? If it's already out does anyone have it and is it any good? Are we able to play as American or British Subs with new interiors and new crews?


Thanks!
SubSerpent