2006 Review of IM / P2P Threats
FTA: In an analysis of threats tracked or identified by FaceTime Security Labs, 1,224 unique threats on greynet applications were reported in the past year, with attacks over peer-to-peer networks increasing by 140 percent over 2005 and multi-channel attacks increasing from 18 percent in 2005 to 29 percent of all attacks in 2006.
A full page of stats and quotes and stuff here. The two things that leap off the page for me are these two findings, from the 2006 "Greynets Survey":
.....whoops.

