I like the privacy, but I think there needs to be one more. Users should be able to select who can send them emails (everyone, friends only).
Also, there should be a block feature.
I searched through the forums and found this: http://www.oxwall.org/forum/topic/1693?page=1#post-9240,
referring the OP to the Oxwall market, but I think these are important security features. Is Oxwall planning to release them in a future update?