Stop motion in SFM is possible, though mildly frustrating. The Motion Editor is the better option out there, carefully editing the timeline for basic and specific movements for each character, like this test video here.
http://youtu.be/C3cTSByiJME

Once you find this phase good enough, then you can go to more detailed poses, like this video here.
http://youtu.be/4qK7MEnUFCc

Finally, the video's settings. My suggestion is to render the video at 15FPS rather than 25 or 30, for a more authentic look. You should also edit the motion blur settings so that everything doesn't look needlessly blurry, only in scenes where the camera is focusing on someone or scenes with rapid movements, like smears and chases.

Originally posted by DiskOperatingSystem:

Hello everybody! I'm very interested in getting into SFM. I think there is so much potential for storytelling, it's crazy! I'm a stop motion animator who is looking to get into sfm. Don't get me wrong, I'm not going to stop the stop motion, heck, I'm doing a film fest in April! So is there a way for me to switch over to sfm and transfer my skills (specifically pose to pose animation). Any tips are welcome! Thanks! :p2chell::health::pleased:

The graph editor is extremely easy to use, and by completely eliminating motion-blur, you can achieve the "stop-motion" look that you'd like.

Originally posted by Dr. Cooldude:

I'm just a lurker in this thread, so I don't really have anything to contribute here, but do you have a portfolio of your stop motion animations? I love stop motion, and I'm interested to check your stuff out. :D

Hey Dr.! I don't really have a portfolio to show you, aside from various Vine stop motion and a really shitty lego stop motion I made back in 2011. I didn't have the armatures for stop until recently and I just bought them. I'm currently working on a film fest short due in April. When I release it I'll send you then link!