We should definitely come out with a better way to inform the community about our release schedule. The real answer is: we don't have 100% accurate answers.
When we have a planned or definite date for any release, we will post about it in this discourse forum, under the NEWS category.
Far as I know right now, here are our plans:
Appium 1.2.3 which will consist of all current fixes, should be released in about two days, assuming all tests pass.
Appium 1.3 with iOS 8 support: we should have a beta release in about a week.