The site has been updated to WordPress 2.5, which has changed the dashboard considerably, and for the better. I am staying with the default WordPress dashboard theme for the forseeable future. WordPress’s lead designer, Matt Mullenweg, created a short screencast of himself using the new dashboard to post and add images or galleries to a post. This may answer any questions you have about how this is done. I encourage you all to take advantage of the new features. The screencast can be found here:
http://wordpress.org/development/2008/03/wordpress-25-rc2/