While visiting one of the best music discovery blogs ever, aurgasm.us, I noticed that the author, Paul Irish, had implemented a really slick Infinite Scroll AJAX technique which smoothly loads the next set(s) of posts without loading a new page.
This blog is awesome and the
author wrote some sweet code.
I was so impressed by the cross-browser compatibility and usability that after checking the copyright and seeing it was GPL'd, I added a slightly modified version of Paul's code to my own blog. I then changed the AJAX loading gif to one that I found @ this ajax gif generator and turned the code into a Wordpress plugin. In talking to Paul, however, I discovered that he and his friend are working on a plug-in too and theirs will actually have options. So I won't be releasing mine but if anyone can't wait until theirs is released, you can download my super simple version here. Your posts must be in the content div (which is generally the case with themes) for this to work. You may also want to remove any Next and Previous prompts.
You can see this plugin in action on the homepage of this blog or at the original source, aurgasm.us.