I am sure there will be other restriction...
I am sure there will be other restrictions - I haven't the authority to make them, as I am not a community leader or admin, the true decision makers here. In fact, last month's War map was supposed to be the Printed map contest, however, Arcana needed to make certain changes to uploading parts of the forum to enable this, yet was out of town on business, so we couldn't do it for last month.
I am sure there will be some kind of theme yet to be determined. So yeah, there will probably be a few more restrictions, so don't go hog-wild yet.
And Hoel, nice to know you're from Sweden, didn't know that. Anna, another member is a master cartographer with her Greyhawk map series. She's from Sweden as well.