I've been on answers.yahoo.com spreading the word about Japanese recently. A lot of people specifically ask about where they can learn Japanese, so I recommend jPod. But about 50% don't ask about where to learn Japanese, but how to say a specific thing.
Questions on very specific vocabulary might go something like this: "I am meeting representatives from a Japanese floral company, what are the names of some flowers" or "I want to learn how to cook from a Japanese cookbook, Help!"
One theme comes up quite often in these questions though. The majority of vocab questions are to do with insulting people, or doing the opposite.
Only today I answered a question where the asker was asking "How do I say 1) Get lost 2) Shut up 3) stop looking at me" in Japanese? I guess they've been getting unwanted attention from a Japanese speaker!
But on the other end of the spectrum is people who ask the complete opposite! Today someone was asking how to say "I really like you, didn't you know?", and it's common to see questions about breaking the ice with Japanese girls in Japanese.
In summary, when someone asks about vocab to do with Japanese cooking, I post a link to one of our recent cooking lessons. When someone asks about restaurants, I point them to our survival series. JPod seems to have covered almost every topic (even monkey training!) but the language of love/strong insults seems to be a popular one that we haven't heard about. And my experience at answers.yahoo.com suggests that there are people interested in it.