Whether you want to build the software, run it, grow the community or just learn more about it, there will be content, workshops and design sessions for you to attend at the OpenStack Summit, Oct 15-18 in San Diego. Stick around Friday for the first OpenStack service day, a 1/2 day beach cleanup.
In addition to the tenant and provider facing APIs the additional functional requirement should be discuss with the following list as an example: Plugin Model - Service capabilities versus plugin capabilities versus middleware capabilities - Multiple simultaneous plugins (to support multiple LB models)
Quantum Integration/dependency - should the service be deployable standalone (without Quantum) ?