The version 0.4 OWL file (in rdf/xml) that is currently served when URIs are dereferenced is at http://purl.org/dsw/ and in the ver-0.4 tag.
The current version under development (1.0) is here.
The Darwin-SW documentation is located in the dsw repository wiki, which can be accessed by clicking here.
Read the Semantic Web Journal submission about Darwin-SW by clicking here.
Click here to download this diagram as a poster-sized PowerPoint slide (46 kb)