Hi5 (yet another social network) is launching their OpenSocial based platform today (well really tomorrow and over the next few weeks) and have done a really great job communicating with developers how stuff is going to work. For example, letting developers know what will and won’t be working in their release plan. Facebook and MySpace could learn a good lesson here in communication. Stop being vague with your plans and let your developers and advocates know what’s up. Facebook has made some great strides with their notifications around larger platform changes, but the small stuff is still an open question.