Along with the specification and supporting software, we are developing a repository for MultiCellDS-based data called MultiCellDB. (The "DB" is for database.)
In the future, MultiCellDB will include a curated library of quality-controlled digital cell lines, starting with digital representations of breast cancer (MCF7, MCF10A, MDA-MB-231), lung cancer (HCC827, H1975), and metastatic colon cancer (HCT-116 and patient-derived lines) cell lines.
The user interface and API are under active development. You can view an early test of a synthetic dataset (digital cell line and a simulation run) at http://multicellds.org/SampleDataset.