Might it be a good idea to create a page to collect animated low polygon models as j3o files to allow a much easier start for jMonkey beginners? I tried many animated models from pages like http://opengameart.org/ and there was none of the 15 tested which could be imported without problems (e.g. textures not added, crashes or broken animations) so it would be realy helpful to create a collection of example monsters, animals and humans as j3o files to be integrated in a project without the problems of converting it. The more experienced users could take some free models, convert them and share them with the beginners on such a page 
I think the problematic models will be the animated ones, using static models I think its already as simple even for beginners as possible.
Thats kind of what they’re meant for 