It's a pitty that I can't be at DrupalJam, but I am very curious at OpenMiner, especially at the technical issues you had building the tool.
Since you show the service OpenMiner at DrupalJam, I suppose you will give an inside view in the modules used, the special tweaks you had to do; and I suppose you will release the code as open source ? Could you point us to the repository or the articles about it ?