Things related to computer security might be profitable as well, if you spin the whole paranoia angle. Other things relating to conspiracy stuff could be popular... there's a lot of "run your car on water" type stuff on CB that you could promote.. I've never looked into any of these products myself, but you could spin it as secret knowledge etc. (no clue if any of it actually works... those specific plans to run cars on water, I mean, not hydrogen fuel as an overall topic)
I'll second the suggestion that personal security products might sell, also going after the paranoia angle.
People like the idea of "secret knowledge"... you could sell photocopies of a "journal" that was full of notes taken over the years, with clippings, patents for obscure technology, etc. relating to conspiracy stuff.. should be pretty easy to put that together based on things found online, then start by getting a few copies made up at Kinkos & stapling them together.. You could put something on the site along the lines of "the government is monitoring this website so I can't post the notes here." etc.. If/when those sell, print more. You could have a lot of fun being creative with this.
And of course, funny shirts (cafepress or others) might be popular as well...
eg. "I went to Area 51 and all I got was a probe..."
(disclaimer: I like conspiracy stuff... fascinating reading! alex jones is quite a bit over the top for my tastes though.. whenever I'm in the mood to read that sort of thing, I generally prefer stuff about aliens, underground bases, etc.)
Best of luck with the site, hope some of these ideas work out for you!