Wokka - Noob pretty much answered it. They just let you know they've reviewed your site in a week or two, not a yes or no answer. I've been told that all get manually reviewed, but in fact many are algorithmically reviewed prior to being manually reviewed. If you've fixed the problem your site will literally be up back in the index before you read the message. At least that was the case a year or two ago, can't say they are the same now considering google's blitzkrieg of changes lately.