Yes. There's an archival thread over on /mlpol/ where we're trying to keep a list of various archives of MLP content and maybe one day put together another archive of our own, or figure out how to contribute to or help out an existing archival project.

MLP G4 and it's fanbase is an almost impossible scenario where the amount, complexity, and quality of the fan output and the culture it formed far outstrips anything "Official". It deserves to be remembered.