This is a gathering place for ideas discussion. Please add an ideas page and link to it from here. When ideas are turned into actual specifications and implemented they can form part of the roadmap.
There is no limitation on what can constitute and idea entry. But obviously if you are also intending to implement the idea or can take it fully to a specification then you stand a much better chance of seeing your idea finally implemented and available to the broader community.
eg. for the Joomla! project.