I've got a couple of problems with anti-splog.
Firstly - it seems to randomly forget its API Key - and it certainly forgets it each time it upgrades.
Secondly I've got everything up to date but I get the following error in my php error log:
Failed opening required 'mu-plugins/anti-splog/recaptchalib.php' (include_path='.:disappointed:usr/share/php:disappointed:usr/share/pear') in /webstuff/canalblogs/wp-content/blog-suspended.php on line 37
Which is blatantly wrong given that its all been moved from the mu-plugins folder.