Well,
I have aquired quite a few PDFs from Ronin Arts, including several "A Dozen...", but so far only "Forbidden Arcana: Magical Foods", "Forbidden Arcana: Magical Pipes and Tobaccos", and "Campaign Planner" has seen any real use.
Rather early in our current campaign, the characters were about to take on the Sunless Citadel when they meet a halfling cleric/wizard who wanted their help in getting an artefact out from the citadel, and he promised them great rewards. The characters, sensing gold, accepted his proposal. What they didn't know was that the halfling was a master chef, with knowledge of how to make magical food and tobacco.
When they returned with the artefact, they each received two "magic muffins of healing", and the group received a masterwork pipe together with ten fillings of "tobacco of serendipity". The looks on the players' faces were hilarious to watch. They were at first almost angered, and they firmly disbelieved the gifts as having any value. After a while they got a little more lighthearted, and started to joke about what the kind of drugs the muffins were stuffed with. Nobody dared come close to the pipe tobacco!
It took several gaming session before anyone dared try a muffin (they actually worked like a cure light potion), and even though they could perceive only benevolent effects of the muffin, they remained suspicious. They still joke about the "magic muffinses", and seem to think that it was a great gag. However, nobody has tried the pipe tobacco (it's laced with "Fox's Cunning") - they are too afraid!
As for the future products, I've begun collecting them. Apart from using the new races and the new spacecraft, I plan to mine them for names of planets, places, etc., which I will use to create a couple of star systems for a upcoming d20 Future campaign (based on the old "Star*Drive Setting" for Alternity).
Cheers,
Meadred
Edit: Spelling