Some experimental settings:
This site takes an SBML File and renders it according to the SBML Layout Extension,
or the JDesigner annotations.An experimental support for CellDesigner Model annotations
(Annotation Version 2.5) has been added.
Update: The Layout algorithm used on this site has now been published: Supporting the SBML layout extension
Anastasia Deckard; Frank T. Bergmann; Herbert M. Sauro, Bioinformatics 2006; doi: 10.1093/bioinformatics/btl520
Read more here: Full Article