So it's technically against forum rules to necro old threads. In the future, it's perfectly acceptable to start a new thread to ask such questions. But to answer your questions before Brandon closes this thread down, no it isn't possible to animator or import objects.
A couple of authors have attempted pseudo animation by having a series of objects turn on and off triggered by a series of reach markers, but it's incredible complex to pull off. Most authors, if they want to make something move will just have the object disappear in one place and a duplicate appear in another. A couple of objects such as the Starfleet doors objects have built in animations for opening or closing.
Importing objects isn't something you're going to see in the foundry as it would open the door for inappropriate content into the game. However, most of the better Foundry authors will build custom object out of the existing assets. Some of these creations can be quite elaborate. Here's a
crashed starship I built a while back.
Sorry it isn't the answer you're looking for, but you'll find with some clever tricks that you can work around many of the limitations.