Be able to pass arguments to blocks, views, etc.

I am making a widget that would allow users to add the page they find the widget on to the collection on the drupal installation, similar to digg or other social bookmarking sites.

I want to be able to append additional 'query' variables to the url of the js and have access to it in my block.
for instance (script)

Do you know how i could do that?

It looks like the flow for the iframe goes like this...

iframe.js -> embed_widgets_get_url -> create iframe w/ url

so i would need to find a way to pass this var along 3 steps?