Same with me here... Since I posted a link to my website on vbulletin.com I got about 10-15 new members and started posting SPAM with bogus links, signups etc etc etc...(and getting roughly 2-3 new SPAMMERs everyday now)

I know there is no list of your site but I posted my forum link in a post as I was having some problem with my forum in IE7 & 8...
Anyway... any good tips or ideas anyone have to STOP SPAM as much as possible?
May be for vB 4.x we need few SPAM control mods e.g.
1) Registration Time Control (if it takes an user to sign up in less than x amount of seconds then it won't be registered and declined)
2) If anyone is using fake IP address then it will also decline user to register OR his actual REAL IP shows up so as soon as he spams and if any mods/admins see it .. We can just ban the person using that REAL IP