well.. Social Networking sites went too high this year... and about current position, i'm not sure but web 2.0 is the best thing that everyone looks for.
spam emails. lol they've been going up since 97'. But if you actually take a look at the spams itself many seem to actually be promoting the same sites, I took an hour a few weeks back to investigate it across several e-mail accounts of mine - and I noticed that a lot of those penis enlargement ads (wrong demographic on me anyways) seem to go directly to the same site (different referral link, but same site).