Unfortunately I haven't learnt how to create my own scripts, but I've had a simple idea for some a script that I thought of while playing with Scriptographer and during my work.
Fill/Stroke Swap
A quick script to swap an objects, or series of objects various fill colours to the respective objects stroke colour or vise versa.
For example, if I have a large amount of vector objects that all have different fill colours, I might want to take each individual fill colour and change it to the objects stroke colour, leaving the fill transparent. Obviously if I have hundreds of objects that I'd want to do this too, it'd take forever to do by hand.
Cheers