Timbers are definitely ‘a shivering with Mortemvetus. A message in a bottle; the wheel of a haunted pirate ship; and a treasure map. (Aug 2017: link fixed)
Pirates vs. Vikings? In 3D-land, anything is possible! Viking Longboats as .obj models with textures. And the Gabare, which is more of a coastal trading vessel, and also done as .obj models with textures. The textures loaded up fine for me.
Xanadu looks rather good, if you need a “1940s USA” look for a scene. I guess you could also turn it 90 degrees, add another copy, and stick it far in the distance behind some haze — to serve as a sci-fi tower?
Gasbit is a Poser-rigged free character. I’m guessing that a bit of extra work, and some Photoshop magic, might also turn him into more of a semi-toon astronaut boy…