I'll try to describe it as best I can. Yes, newsgroups (Usenet) is like one gigantic global message board forum. There's ones that are text-only, and some that are used for posting pictures, videos (binaries). You either format your Outlook Express, or Netscape web browser to read and post. An altenative is Google Groups, that not only lets you do that, but actually ARCHIVES all
posts as far back as the early-'90s [the downside: you can only post to 5 newsgroups at one time, there's a cap of how many posts in a certain time period)! Posts also appear in Google searches.
Because of the circumfetishers in alt.circumcision, I would post your story separately, because those who respond would post the messages in the other newsgroups and quite frankly, the circumfetishes act childish and tend to distract from the main goal-- education. But I would post it separately so those who ONLY go to alt.circumcision, could still get educated, even though there will be some childish "go clean your gross disgusting foreskin" comments will be needed to be waded through.