Ha, a good friend of mine is INTJ. He finds it amazing how I can live without timetables and plans, and how "disorganised" my mind apparently is. He says he sees his as being like an office. Not metaphorically, literally like an office, with departments and places to file things away. I can't even imagine what that would be like.
I think INTPs and INTJs will always have obstacles to getting to know eachother. The P/J divide is just too noticeable. We (or I, at least) find their completely anal need to organise and plan everything to the smallest detail incredibly frustrating, and they find our ability to live without a timetable annoying. Reading the thread, you can see they're quite dismissive of us: "They argue to question, rather than to answer" and "they never stay on topic". How can there be answers without questions, and why should a line of reasoning that could lead somewhere fruitful be cut short just because it strays away from the topic at hand?
Scroll down a bit and ShaiGar is there...
Edit: Reading their forum. They really are insufferable... >.>