I was curious if third party products that receive this type of license will make their appearance in future books of Paizo? Basically, will we see anything that will make it into any "official" works, or will we only still see the items that Paizo has created?
For example, could Warlock training grounds show up in future cities?
Will any of the third party compatable items make it to Pathfinder Canon?
We essentially have a clean slate so to speak with a brand new world setting. With a limited budget if these items are never going to see the light of day in Golaria, then this would give me a better idea on where to spend my money.
There's really no way to predict that. Some 3.5 books are things we rely on heavily (Tome of Horrors, for example), but the vast majority of them never get a reference. If there's a quality 3pp book about a topic and we think it's relevant to bring over some of it into a PF product, it'll happen. So... you should encourage 3pp to make really, really awesome books so they're sure to get our attention. :)