Spam...And Not the Meat-In-a-Can-Kind

I'm baffled. My guru for my personal website has done all he can to prevent me from being spammed—you know when some robot trashes your blog with about a hundred comments, selling everything from luggage to t-shirts to medicines to make a body part that I don't even own work better? It seems when I post more frequently than once a week, I end up coming in to clean out a ton of spam. The good news is all comments have to be approved by me, so none of this crap is ever seen by my readers. But g...