Thoru Yamamoto created this tool:
http://www.languagegame.org:8080/zoo/243 (look for ToyAnimGIF)
This one and ToyPoser are very interesting for students, so we use modificated versions of it (ToyAnimGIF had a litle problem) at our classrooms.
You can read about the tool:
http://squeak.educarex.es/Squeakpolis/150
download the image for test it:
http://squeak.educarex.es/Squeakpolis/uploads/128/EducarexSqueak.image.tar.gz
download the debian package:
http://linex.educarex.es/linex/pool/linex/squeak/squeak-educarex_20090428-1.tar.gz
or download the -litle older- win version:
http://squeak.educarex.es/Squeakpolis/uploads/9/SqueakEducarex2008.exe
Thoru made a good job, and our work is open source, of course.


Cheers