Robert Scoble says he gets about 1,000 spam comments a day. He even suggests that the spamming may lead him to remove comment support.
You may have noticed that my comments aren't working here. I had to pull them several weeks back. There was way too much comment spam coming in each day. It was a huge problem. 500+ spam messages each day was common. For awhile, I switched over to manually OKing each valid comment. However, this wasn't good enough for the hosting company. They didn't like the excessive traffic. So I pulled the comments for now. I've been too busy and lazy to come up with a way to better prune out the spammers. One idea is to move the blog where we could get more robust spam blocking.


Incremental Blogger