The latest release of Gallery (2.3) now has Akismet support built in. Thanks to Chris for letting us know.
Kevin at BIGACE CMS has developed a commenting extension which uses Akismet.
And lastly but by no means least the latest version of vBulletin blog also has Akismet support by default.
If you upgraded to Akismet 2.2, you likely noticed a cool new feature: Akismet stats. We’ve now released Akismet 2.2.1, which includes a few bug fixes.
Akismet stats track your comment metrics, including missed spam, false positives (Akismet thought it was spam, but you disagreed), and Yummy Pie, which displays your ham vs. spam count in [...]
Bermi Ferrer wrote an Akismet plugin for the Akelos PHP Framework, a Rails port to PHP. Check out his documentation on the Akelos wiki and grab the code here.
