I am now seeing that not only is ontology overrated, it's also underrated! Some questions can only be answered by visualizations that include very complex ontologies to back them up. Such as, "Who's everyone I know?", or "What are people doing these days?" There are values decisions going into the answer, but that doesn't mean they're nonsensical questions, and can't be answered, ...
I'd be happy to just attach key-value pairs to URLs (thus forming a triple, with the URL as the subject); My automatic a-priori thought is: "namespacing the keys is unnecessary and wasteful." I would be REALLY EXCITED if Unalog supported tags such as foo:bar (where foo is a key, bar is a value,) and some way of programmatically getting at that data.
And there's more! We can't really reveal much of the other hot stuff we're working on - but how does "Enterprise TagTagger" sound? We knew you'd like that.