I wrote a small jQuery plugin around that idea ( at https://gist.github.com/435668/85466138a24814baef3ec6a73b7cc... )

This approach allows you to specify parameters as JSON. So data of arbitrary length can be passed without having to resort to some global variable.

It solves a problem I had where I needed to pass some template engine generated content into an otherwise static script.

Thanks for the tip :)

Right, but then you have to require that your script be loaded synchronously. And this is really just a hack to get around the fact that browsers don't provide a proper API.