With the upcoming changes in Wordpress to enable more CMS-like features (including draft pages!), something else I'd like to have is the ability to preview my changes to an existing post / page. Right now it seems like there's no way to do that; since the post / page is live then as soon as I save my changes, the changes are made live as well. I didn't find this in the Wordpress Trac, so I thought I'd mention it here.