You can find out more about SOPAC:
- John Blyberg's own blog post about SOPAC 2.0
- The Library Journal article on SOPAC
- My earlier blog post
- An audio interview with John, via Talis's Panlibus Blog
- Almost Christmas in Libraryland…Ho Ho Ho Mr Blyberg from Kathryn Greenhill's blog
From the interview, it seems that the code for SOPAC will be available in a week or two, and John stated that it will be GPL-licensed.