I'd like to make a script that replaces either the Notes box in the contact page, or the sidebar of a conversation thread, with content pulled from my server, very similar to the way Rapportive (http://rapportive.com/) works. I'd even like to be able to grab the email address of the person being looked at or emailed with, the way they do.
But Rapportive uses a browser extension. Is there any way this can be done via a greasemonkey script?
Is this something I should use a gadget for? Can I get the email address of the current 'context' from inside a gadget?