Yes, that final confirmation that Google has listed you…
You start finding Spam messages on your comments list.
So, make sure your Blog does not publish any comments until you have approved them. This is not cheating. Spam messages and other marketing messages are not what your Blog is for and reduce your message relevance both for users and Google. Interesting and relevant comments are something different. They enhance the listing and show that people not only read the post but want to contribute. Do not be afraid to comment on your own listings, either to reply to a comment made by somebody else, or maybe to offer up a link to another article which follows on.