RIM is once again running a Unconference Day at BlackBerry Jam San Jose. They started the tradition this year at the first BlackBerry 10 Jam and it seems like the concept is working. They are asking developers who are coming to BlackBerry Jam San Jose to submit session topics in two categories. Either the session can be taught by RIM experts or if you are an expert you can teach it yourself. They have openings for eight sessions (4 by RIM experts, 4 by community experts) so send in your submissions.