If you run your blog on  WordPress 2.5.1 or higher , you might be interested in a new security plugin called WordPress Exploit Scanner . I find it very easy to use an also very useful because it has already detected a malicious comment on my blog which was already tagged as spam by Akismet ;  – lucky for me I guess .

From it’s creators:

This WordPress plugin searches the files on your site for a few known strings sometimes used by hackers, and lists them with code fragments taken from the files. It also makes a few checks of the database, looking at the active_plugins blog option, the comments table, and the posts table.

So go and get your WordPress Exploit Scanner plugin for free !