If you want to have collaboration on this, maybe think about splitting it into backend and frontends. With the backend being the storage, and it's import-mechanism, and the frontend being open for anyone to put their own view onto the data, and maybe work with them.
Maintaining personal data has demand here, but so far there is no real unified project catering to a broad range of services and different types of data. So there is a space to fill and a community to build IMHO.