This is perfect, I've been wanting something like this for a while but have been too busy to build it myself. Any chance you'll throw it up on GitHub so we can see the source?
Zephyr: Glad it's useful. It's actually super simple, and github would be overkill. It simply extracts the active query from the open page and redirects to scholar. The complete script is:
"javascript:location = 'http://scholar.google.com/scholar?q= + escape(document.forms[0].elements['q'].value);"
I made the webpage with a description and drag-able bookmarklet in order to help non-coding researchers easily add it to their browsers.