Hi there,
I'm currently working on a mod to add an additional faction to the game, called the Meme. In short they are an army of insane clones intent on taking over the galaxy based on the very narrow ideology of their original creator.
I have no idea if I'll finish this mod fully, mainly due to the time and skill required to do all the texturing and 2D work, but for now I am enjoying myself. So far I have done a basic tech tree, modified some of the basic ship/structure stats, and done about half of the ship models.
Here are some of the ship designs in their present state.
Capital Ship - Battleship

Frigate - Light

Frigate - Scout

Frigate - Siege

Frigate - Long Range
http://www.strawberrydragon.com/gimages/Sins-Modding/loongrange.jpgCruiser - Utility
http://www.strawberrydragon.com/gimages/Sins-Modding/utility00.jpgConstructor
http://www.strawberrydragon.com/gimages/Sins-Modding/CONSTRUCTOR.jpgCapital Ship - Siege
http://www.strawberrydragon.com/gimages/Sins-Modding/seigecap.jpgI will show further updates here as and when they are complete.