What’s the deal?

I estimate that close to 50% of the search engine hits I get here at MO include the terms ‘XM8’, ‘XM29’, or ‘OIWC’. A few weeks back I noticed this trend and felt obligated to do the subject some justice. I don’t know if I succeeded, but the googlers just keep coming. What’s up?

FYI, here’s the my earlier post.