This is the Om Todo database. The database is how we keep track of planend features and reported defects. The items in the database are, themselves, files and directories with the metadata stored in "omrc" format - so that when we have some minimal form of Om working, they will be Om objects. One of the first planned deliverables for Om is a set of tools to manipulate the Todo database, including generating this web version (which is now done in Python).
For more info on how the database works and how it's supposed to be used, you can check the embrionary texinfo documentation in the Om source repository.
Right now, in this initial development stage, the database is not open for public submissions. If you want to report a defect or suggest a feature, use the mailing list (unless you are a developer, in this case use the database and commit right to cvs).