We would love to be a part of the beta testing.
Good to hear that you'll be redesigning the templates. As mentioned in another thread previously, we'll be focused more on getting our site mobile-friendly early next year. We hope you'll look into that, especially getting the templates looking nice on popular mobile phones and on iPad / tablet devices.
One thing to suggest (see attached) would be spam filtering. The admin should be able to easily add a list (word / phrase / URL per line) and any ad submitted with those matches will go into a moderation queue. This should be fairly straight forward.
Tommy (on behave of shri)