Along with the theme's custom widgets, the following are also possible using shortcodes:
Recent Posts
[recent_posts title="Recent Posts" numberPosts="3" /]Popular Posts
[popular_posts title="Popular Posts" numberPosts="3" /]Latest Tweets
[twitter title="Latest Tweets" numberTweets="3" username="unispheredesign" /]From Flickr
[flickr title="From Flickr" numberImages="16" flickrID="52617155@N08" lightbox="true" /]