http://www.harvestmoononline.com/
That's right, its going down. It died. That's not your problem. However, their incentive for finally saying they're done was this:
I'm sure you all know that Marvelous and Victor Entertainment have announced an official online version of Harvest Moon. This only further adds reason to why this project should be shut down. The chances of a lawsuit have risen and we'd be competing against too large of an opponent. We wouldn't stand a chance at all.
Their old website was here but it had almost nothing promising.
So since I didn't see any online capability, which I am sure would seem very nice for a fan-made project, I just want to put a word of warning to anyone who hoped to see a havest moon online, whether by making one or finding one.