A greasemonkey script would do, but a standalone Windows app would be much better. (OSX and Linux as well.) Something with a very simple UI, with a login screen and one button, which would yield an XML or JSON file. Preferably, it would simulate the browsing speed of a real user, with randomized parameters, so it would be undetectable. If it ran in the background, it would still be relatively painless.
Why this would be so useful: I'm envisioning a counterpart program that can upload such information into something like Diaspora. I'm not advocating that Diaspora create such an app. Someone else should do it. Someone who might like to develop a rep as an outlaw. (A beneficial one, however.)