browser-independent awesomebar
application that runs in the background separate from a web browser (similarly to quicksilver) and listens constantly for changes to the browsing history of any of the web browsers on the computer (firefox, safari, chrome, etc). this would enable you to use different browsers for different tasks (chrome for google docs, safari for flash, firefox for reading, etc) while still compiling a unified history.
you could the invoke the hotkeys, type some words from the page url or title, and then either open it in a new tab in the default browser, or choose a browser like you would with quicksilver.
since browsers can import the history from other browsers, it seems like this would be possible. could have other cool features like showing statistics about browsing behavior and integration of bookmark data without bloating the browser itself
AND you could make it a social app and possibly share your history with other people, or send things to others directly from the quicklaunch box
maybe this is just a quicksilver plugin?