Recently I converted my vB site over to the latest UBB and completely solved my spam problem. With vB I was deleting spam almost hourly some days, but now, I've not had a single spammer sign up and try to post. Good decision.
Greg AKA Virgil Earp at the OK Corral Tombstone, AZ
I currently have a Vb forum up and I know what you mean. I have a stop spam hack installed and thus far it has stopped over 16K+! I like Vb but I find that if you don't place your site in their directory the spammers are not quite as bad.