Movable Type plugin – SpamFirewall

Lately, there hasn’t been a lot superb plugins for MT. There’s a couple here and there, but this one stood out. In fact a whole bunch by Mark Carey stood out. SpamFirewall basically hides your commenting/trackback ability from the slower comment bots by spammers. It will not effect the way your readers see the site but actually mask the offending cgi behind some php. It’s actually a very brilliant method and has and will decrease the load tremendously to your hosting server.
If you’re running MovableType, take a look at SpamFirewall.