I read about "Promotion" a bit... It seems you have already promote many wikis, right? Is it hard to get approval?

For the approval is not, since most application will be approved as long as no inappropriate wordings or images is used. (For example, that almost-naked Est in STnBD definitely will be rejected if included :p)

However, the image purpose lies on attracting new editors, so that's why it's always become the hardest part to decide.

I see... For a while now, I thought I would promote STnBD wiki. Then something stop me from doing it (lol). If it is such a simple thing to do (simple?), I think I might give it a try.

Just make sure you include attractive pictures (which is sure hard to find -_-")