Foreign Spammers

Due to the increasing number of foreign spammers on the EWG website commenting how great the site or article is and then requesting checking out their site (with a link), I am now setting comments to moderated. They will be allowed if you are legitimately commenting but may take a little longer.
1. This is annoying as I look forward to feedback and interaction with my site goers, so its a little disheartening to go 'ah sweet, a comment' and it was some European, Australian  Middle Eastern or Asian - based website spam.
2. Its in a way flattering as I guess these people have decided my site has enough traffic drawal to try to cash in on it. Thanks to all the regular readers for that.
Moderation-on. Or rather, I'll start with a word verification and then upgrade to full 'moderate comments' if that doesn't work.
Follow Up [5 Min Later] - Yep, works like a dream. Take that spam bots.