Spammers are a curse to all forums, but there is a better solution that would require a little doing.
I've administrated several forums in my time, and sadly, lack of time prevented me from taking Vesko up on his offer to give me admin here, or else I would do this. Since I've never used the Admin CP on this type of forum, I can't give you a complete walkthrough, ptex, but these steps should be doable on any forum.
1. Create a user group with the privilege to avoid moderation queues.
2. Add all active members known to not be spammers into this group.
3. Allow promotion into this user group after 10(or up to 50) approved posts.
This will eliminate the backlog and ease the moderators job while allowing the majority of members the freedom to post as they used to. Please take this into consideration, and if you guys need any help doing this, send me a PM.
Know what is in front of your face, and what is hidden from you will be disclosed to you. For there is nothing hidden that will not be revealed. - Gospel of Thomas