Its up. Just download the OBD II SDK it includes the binary forms of the dlls and the source for them as well as a c++ demonstration program. All the documentation is in the form of comments.
Although, the plugin has been verified working, I didn't get a chance to extensively test the ELM plugin yet, but I will be doing so over the next week. The interface for the plugins shouldn't change but i'll probably updating the implementation as I find bugs.
https://filebox.vt.edu/users/cholbro..._Developer.htm