PCs infested with 30 pieces of spyware
The average home user's PCs carries nearly 30 'spyware' programs secretly forwarding information about a user's online activities to others without their knowledge. You can read the full story at VNUNet or BBC News. The story also hit Slashdot, where you can see people comments about it.
If you want to check your machine for spyware and remove it, try the following tools
Spybot - Search & Destroy
Ad-Aware.