Regarding EQ presets, you can name and save what you've done within the DSP Studio EQ and reload them at will. I don't know how you would share that specific setting info outside MC or with others, but you can share EQdb field data, certainly. Users could create EQ settings via EQdb and then share their results, the alphabet soup you see in the data field, presumably without any data ownership implications.
Ultimately, a database could be assembled via King Sparta's revolutionary Data Master plugin, which currently oncly exists in conceptual form inside Sparta's skull, but I'm hopeful.