Kim, thank you for your thoughts on the plugin idea.
Regarding the release date of Sunrise Racer — I am currently coding a plugin for making widgets out of other plugins (like the Popularity Contest plugin by Alex King) which only offer an access to PHP functions that you can use inside your theme’s code. With this plugin you could turn any other plugin into a widget.
Therefore, once I am finished with this one, I will initially release the Times Racer and then the Sunrise Racer.