The blog-this url is a handy bookmark if you want to Blog something quickly with Blogger. It also accepts parameters like the blogID, which is your Blogger ID, the, n, the headline, the u, the url or the b, the bodytext. Ofcourse you could create a little javascript or "bloglet" which then automatically inserts the page you are currently viewing in your page. This is what Blogger/Google offers in their BlogThis bookmarklet.

There are ofcourse multiple users who have changed this little bookmarklet as it is set up by Blogger, like justinsomnia who changes the screenwidth and such.