Here is my last theme Farmville, inspired by the popular Facebook game with the same name, with more than 70 million active users and counting.
Features:
* premium theme with options page
* 3 header options to chose from (configured in the options page)
* featured posts gallery (can be enabled / disabled in the options page)
* post excerpts (can be enabled / disabled in the options page)
* post thumbnails (can be enabled / disabled in the options page)
* submit to facebook button
* widget ready, gravatar ready, rss ready
* crossbrowser compatible (tested in all major browsers)
* working with the last version of WP and lower