Barraccuedda comes bundled with caching modules and backup/migrate module, I think havin an internally preconfigured anti-spam contrib module would be awesome.
I would like to suggest the module at http://drupal.org/project/badbehavior which is the bad behavior module.
There may be other modules available, but this module is especiall y interesting because it:
Bad Behavior is a set of PHP scripts which prevents spambots from accessing your site by analyzing their actual HTTP requests and comparing them to profiles from known spambots. It goes far beyond User-Agent and Referer, however.
The problem: Spammers run automated scripts which read everything on your web site, harvest email addresses, and if you have a blog, forum or wiki, will post spam directly to your site. They also put false referrers in your server log trying to get their links posted through
your stats page.
As the operator of a Web site, this can cause you several problems. First, the spammers are wasting your bandwidth, which you may well be paying for. Second, they are posting comments to any form they can find, filling your web site with unwanted (and unpaid!) ads for their products. Last but not least, they harvest any email addresses they can find and sell those to other spammers, who fill your inbox with more unwanted ads.
Bad Behavior intends to target any malicious software directed at a Web site, whether it be a spambot, ill-designed search engine bot, or system crackers. It blocks such access and then logs their attempts.
And its free. But it requires boost/reverse proxy and load balancer cnofiguration and would not be a simple drop in module to be used with barracudda bya novice like me. If Barracudda was preconfigured to be compatible with this I think it would be a great addition.