Moon sign forums and ascendant forums..

...are a really good idea.

They already have this unless you mean a specific forum for each moon sign and ascendant.

specific forum.

You can even lump them together, to avoid having 24 forums. This way people would post at least in two of them, one for their moon and one for their ascendant and it would drive traffic.

Aries Moon/Aries Ascendant
Taurus Moon/Taurus Ascendant
.
.
.
Pisces Moon/Pisces Ascendant

I have 5 topics on my mind on aries mooners...it doesn't seem fair to clog the whole moon sign board