Yupp, I found this cool little plugin that reduced my spam comments by 95% This will stop any bullshit no hands seo spammer right in its track and will reduce the time you use to deal with bullshit on your money blog. The plugin is called WP No-Bot Question and it is 100% free. That is really all i wanted to say. Keep the spam away from your money blog.
Not tried this one, but found that Akismet does a great job in reducing spam. It's blocked over 50,000 spam messages since I installed it and I hardly receive any spam messages coming through to me.
This plugin adds a field to your comment form where the user will have to answer a question that you specify, the generic bots won't know how to answer those.
For sure,Akismet is best. Just incase,this plugin "http://wordpress.org/plugins/bulk-comment-remove/" is useful to remove unwanted comment from your blog
Looks like that plugin author got the idea from an established plugin. http://growmap.com/growmap-anti-spambot-plugin/