ajax on rails

i went through oreilly's ajax on rails tutorial. i can't believe how easy it is to use ajax with ruby on rails built in functionality. very nice.

what i want to do now is incorporate ajax for the menu. i'm trying to figure out how to paginate the recent posts to say, five or so, then have the pagination links at the bottom and when clicked will XMLHttpRequest the next 5 recent posts and replace the current links with new links. hmmm... i tried mentally going through it to figure it out, but i can't quite grasp how to do it yet.