Thanks for the responses. I actually don't care too much about the decrease in traffic, I'm more just wondering what the point of the whole thing was. For example, after getting an email stating the penalty was revoked, I was averaging around 60 visitors/day from Google. It has continued to go down since then (over the past month) to 50 visitors/day. Should I expect to see any increase in traffic from Google once an unnatural penalty is revoked or is there some other benefit (that I'm not currently aware of) which helps the site after a penalty is revoked?