The amount of spam (in comments) in the past 2 or 3 weeks has been much more than the past 6 months altogether!!

Its starting to get annoying! Anyone know any ways to stop these spam comments?? I know I can block certain words on wordpress, which I do, also there are restrictions on linking on the comments…..

That doesnt seem to be enough, so many commets right now are from spammers but seem to be one liners with no links, why? how does that help them?? Most of the spam is in very old posts but I get them on my email anyway, at least 30 a day, some identified as spam and blocked, some not! Any help? Im not a big fan of the letter verifying thing though …