Just like all main CSS exists in one .CSS file, is it possible to have something like Additional JS Definitions too and have ALL the javascript in one single .JS file.
While reading best practices for speeding up website, the main point they have considered is to reduce the number of HTTP requests by combining all scripts into a single script, and similarly combining all CSS into a single stylesheet (which vb does to some extent)
If all our javascript can be definable from within vbulletin's interface and can be merged into one single file alongwith vbulletin's default javascript code (just like we have for CSS), then please consider this.