I just posted my Borg mod.
1035747855.zip
Take a look, see what you think. It is designed as a player race. An AI using it would probably be crippled since it relies so heavily on analyzing the tech of captured ships.
It does contain a lot of nice new techs (maturation chambers, assimilation nodes, adaptive shielding, new vehicle sizes, the Borg Queen
...) and has some new pics (components, etc.) that could be quite a nice addition.
Kwok:
Nice galaxy class. Tis sweet.