Hiya.

The animations you make in Poser can be used...just not the actual mesh itself. As Matt mentioned, simply output your .bvh file then import that into a 3D program that lets you use that kind of motion capture file.

PS:"To make naked figures purely to perv at? Hardly." Actually, yes, that is Posers primary purpose. If you don't believe me take a gander at Renderosity and DAZ3D. DAZ is the company that now owns Poser; DAZ's primary source of income is selling "props" to Poser folks so that they can slap some textures on a poser doll, pose it, hit render, and then delude themselves into thinking they are 'full fledged 3d artists'. *shrug* Read their forums sometime to see where the mentality of most "Poser fans" is.