Why did you find JavaScriptMVC a bit heavy? The Srchr app was 37.8 KB (Gzipped and Compressed). Which is pretty good considering it packages jQuery (24KB) and all of the MVC parts. So JMVC, plus the app only was 13KB.
Further, if you read the article, that is exactly what is happening. It's producing custom search events.
Please re-evaluate JMVC, it's really a bunch of low-level libs that provide just a little more power to jQuery.