I modified the Staticize plugin I have installed on my blog to allow the inclusion of dynamic function calls within the cached file. This allows the Countdown plugin to keep updated correctly.
I am currently working on my first plugin that is all my own. It is a plugin to allow code to keep all its spacing in a post, and to colourize certain types of code (colourizing PHP will be first since that is the easiest to implement, but I will also add colourizing for SQL, and possibly PL/SQL). The nice thing about this is that it will play very well with the Staticize plugin and once a piece of code is colourized and viewed, it will be cached and won’t have to be re-parsed until it is changed which will take a load off processing if this site ever gets popular.