Some of you are probably aware of the awesome artworks yughues is posting on OpenGameArt all the time:
http://opengameart.org/users/yughues
and much of the textures and map-models would fit well to Unvanquished and would show of the new fancy rendering freatures as they all come with a normal and spec. map.
Yet, I wonder why none of it has shown up in UNV yet...
P.S.: License is CC0 which is basically public domain and thus fully compatible with the Unvanquished art license (e.g. CC-by-SA).