I agree with the Ascension - very nice, subtle, easy-on-the-eye color scheme.

As far as posting WIPs, there is no 'rules'. Obviously don't over-do it (ex. ooh I added a single square let's post a WIP). Usually anytime I've made a significant step, or change something that has a large affect on the map as a whole, I'll update the thread. You can always go back and delete older WIPs if you want.