This mod create ore at world gen, i think you'd better put a version before all buildcraft /IC2 and so are officialy released.
Why ? Because maybe there some people like me that once the "main" mods are officialy released, they start their "version world". After this, any mod that NEED a new world generation, will be simply ignored until (maybe) next MC version, or sometime, if i restart a new world or lot of mod need a new worldgen.
There's no need of a complete and final release, you have other choices :
Or - Release a light version that will only do the world gen and that we can include in our new game while waiting your release.
Or - Putting in your release alt recipe that allow to avoid completely your ores (maybe enable them in config).
Or - Make an option to spawn once ores in already known chunks (Thaumcraft 3 will do something like it, if "true" it spawn ore and set "false" to the config file itself after)
Or - Tellin people your mod is the best of the best, and startng a new world is the price to pay 
(actual feature).
Of course i know you can't make stable version when the mod you add is not release. But this is only factual and logical things. In my spiritual dimension, you CAN do it
Oh and i forget to tell you that i know people that are knowing people, who are knowing people, who knowed people, and themselves are knowing people that are very important ! so you'd better do what i said ! (Not sure this will work, but i have to try...)
