It’s an interesting approach to presenting real time search. Trackle basically presents real time search with a community twist. In simplest translation, Trackle allows you to utilize the efforts of others in the community with the help of keywords.
The defining feature for this service I think is that the user is able to sort and sift through provided categories rather than relying exclusively on a single grouping of provided results.
There is also something to be said of using Trackle filters as well. Overall the site is pretty cool. And even though I am not too big into the real time search thing, if you are, this is the way to do it.