Trying out blekko

Blekko is an interesting new search engine where you can do a positive filter by including a slashtag. /ruby and /javascript worked well for me. I created slashtag /edallen/wargame when I didn't find a wargame or wargames slashtag and put a few favorite links in it to start out. I couldn't figure out how to exclude based on a term or slashtag so far, like wargames -movie or wargames -/movie to get links about the movie out of the listing. The help section on blekko was silent on this so far as I could tell. They talk about excluding individual results from the returned set after the fact but not filtering the search by exclusion as far as I can tell.