I have no idea what AMA is or what kind of format it is, never the less, some thoughts on topics:
Worst traveling experience. We all have some terrible stuff in our baggage, may it be being mugged, seeing something unpleasant, a terrible hostel/hotel, being lied to (more than usual) or too high expectations. I am thinking anyone participating in such a discussion will either be new to the situation and can learn from what's told Or they will find themselves remember the exact same thing and can contribute. I know I would Love to have someone talk to me about their "in general" bad experiences when traveling to certain destinations, when an experienced traveler tells you they had a bad experience it is probably true.
Best traveling experience, so far. The exact opposite to the above. Single out some fantastic stuff, maybe there are even several of us to agree on some things, a good conversation to reference when someone asks about this sort of thing. And god knows people ask! An epic saga of awesome adventures from different peoples perspective woooo :D
Making money will on the go. Can it be done, are there people doing it.
Traveling insurance, what you haven't got it???? Not sure how to put this, but the whole insurance thing, most of the more seasoned travelers are rather care free people I believe. And generally don't fall for simple adds, but I feel this should be discussed, especially since it varies greatly between people you talk to. Again could well be a great discussion to reference in the future.
All the above topics (and subsequent discussions, including the traveling with children suggestion posted before) could be used as foundation for blog posts on the same subjects on the blog. Whenever we do get out of Beta. I could reference people there, people that doesn't have a specific question to ask in the Q&A format, just family and friends wondering things. I don't know how many times people ask me about traveling insurance. The discussion would then provide a foundation with many views on which a blog post would be great i think.
You guys will have to steer me in the right direction if this doesn't work for whatever AMA is. (Ask My Answer?)
EDITs: Oh and also, I'd be happy to share my traveling experiences :D
Oh and also also, maybe some topics should be in a kind of non-realtime, I mean send a mail to the traveler asking some specific questions or just statements, and the traveler can then have some time to answer. This again would be more as a foundation for future blog posts, and probably not at all in line with AMA. In fact maybe this should be in another post all together.. Oh well. Sort it later when the comments start coming in.
Oh and also also also, I love this whole idea btw. Just as a side note.