Launch

Launch is a free WordPress theme by ThemeZilla by Orman Clark. This Tumblr-fashioned WP theme is ideal for personal bloggers who like to have a very informal and friendly online discussions. You can use it to add your own self-hosted videos, audio clips, images, galleries, asides, links and quotes along with regular blog posts.

You can download this WordPress theme for free from ThemeZilla.  It also support quick adding of Twitter and Flickr .