Be careful if you seriously plan to offer it to the PlaneShift game: For my taste it contains a remarkable, possibly too high amount of earth-typical elements. The Pisa tower is only the most obvious of them... might require some more originality.
I remember that the dev that modelled that Pisa tower recieved some criticism about it and it had to be changed, why it is still there is a mystery to me as well but sometimes it takes a while to get those things redone and put back in. We're a game in development and there's often more important things to focus on, like performance and texturing for example.
And to straighten some things out: When Vaalnor was still in early development we planned on contributing it to Planeshift, it got firmly rejected if I remember correctly. Some of the Vaalnor guys then moved over to a game called Peragro Tempus, an "evolving multiplayer online role playing game" as we like to call it, which has been going like a speed-train in terms of development.
I do wonder why you're criticizing on "earth-typical" elements, Planeshift is packed with those. Read up on our settings on the wiki page. We try to be as original as possible and it's easy to contribute to Peragro Tempus, so sometimes a "Pisa tower" gets in-game because we like the model. You should see it more like a place-holder.
