I've set up a site using Buddypress and Multisite but I have an issue with spam. I have now recieved 2 spam blogs within 24 hours. Are there any free plugins like akismet for multisite blogs/posts (not just comments). I have found Anti-Splog but it is too expensive.
Also, are there any other ways to prevent spam signups. I already use confirmation emails and a CAPATCHA.
Thanks in Advance,