I noticed on VNDB it says that you guys, Seiha are translating Himegari, but I cannot find it anywhere on here, is the translation project still ongoing? or has it been canceled? I really wanna play it after kamidori.

Aroduc never says what exactly he's working on.
Himegari note on VNDB is just a guess rather than a fact, but it's very likely.

Speaking of translation projects, why can't I access the Shinig Ark forum?

Because it's hidden from everyone except Aroduc humself and maybe a few chosen ones.

I'm also looking forward to a translation of that game. I bet it would make a lot of people happy.