Possibly because it's a enabling/plumbing type of technology? I notice that the main opencalais.com website struggles to explain exactly what it does, and why i

Possibly because it's a enabling/plumbing type of technology? I notice that the main opencalais.com website struggles to explain exactly what it does, and why it's cool. There also don't appear to be many applications written with it. From what I can see, there's feedtrace and newsfacet and ... that's about it. Perhaps if there were a really compelling example of what you could do with it, but an autotagging WordPress plugin doesn't really fire up the imagination...