It seems, RIM has failed to attract developers, the credit goes to broken development process and tool-chain. One has to spend good amount of time (and money?) setting up development environment, building application and deploying the same to marketplaces.
Why would developers bother looking at Playbook development, when they have better options (iOS and Google Android), where development, deployment and monetization is relatively very-very simpler.
Developer usability is very important. Any company that relies on developer community/ecosystem for their growth, should take some lessons from Jamie Murai’s open-letter, which enlists some important points/issues.