Spam scouts

If you have a blog and you are fighting the good fight against comment spammers, look out for bland and seemingly innocuous "nice site, thank you" comments from people with distinctive names you don't recognise: they could be spam scouts, where if this one innocent comment gets through then thousands more follow chock full of the usual links. A quick google (sorry Google) for the name or comment text will usually tell one way or the other: check if the same user always leaves the same comment.

Edit: here's the guy - Jeorge Lukasing