Ars Technica reports that there's been a significant surge in spam in the last few months (and it's not like we weren't getting any spam before):

The volume of spam being sent has seen a significant increase recently, and the jump is being attributed to the increasing use of botnets by spammers. Symantec reports that in a recent survey of small businesses, 64 percent reported an increase in the volume of spam received over the last six months with a third saying that the increase was "significant." Jay Best, help desk manager of ihug in New Zealand, said that the ISP had seen a spam increase of 40 percent over the last month alone, and that a spam explosion over the weekend has caused some 37,000 customers to experience e-mail delays of up to 24 hours.

If you want to see a graph, check here