Can a scrollable date picker be done in WordPress for archives?

I’m going to leave the JavaScript/jQuery of the scroller up to you. But basically, run a loop of dates in that scroller. Then, when clicked, pass that date via AJAX to the server. Then use that date to query_posts, which you then return and insert into your dom.

Use http://www.garyc40.com/2010/03/5-tips-for-using-ajax-in-wordpress/ for the AJAX functionality. I got lost the first time I read that article, but it does explain how to use AJAX properly with WordPress.

Let me know if you get lost