<blockquote>tomraegan said: - How do I launch the Research Tree UI in-game?</blockquote>
You display it via menu screens. As said above, you use the Research (Tree View) menu part instead of the list view version (e.g. used in the tutorials) to display the tree UI instead of listing the stuff.
<blockquote>tomraegan said: - If I add the tree to my existing canvas and click the buttons, will it talk to ORK?</blockquote>
No, the UI objects alone don't work, they need the menu screen in the background to give them their content and handle the whole learning stuff.
<blockquote>tomraegan said: - Will it abide by the Research costs when I click the buttons (currently I can just click on any button in the tree and nothing really happens besides the button becoming selected...it's not talking to ORK, so I assume I'm not launching the tree correctly)</blockquote>
Only when it's used by the menu screen, otherwise it has no actual content and functionality it can call.
So, if you already have the 3D playground setup with the list view menu, simply change that menu to use the Research (Tree View) menu part instead. Naturally set up the part (e.g. selecting UI box, etc.).