I'm visiting friends in South Wales, and I'm using their BT internet connection. This gives me the first check that the BT-Phorm warning system is still working (it is - if you're on BT, you'll see the grey box with warning script on the right.
If you see this warning, click on the InPhormation Desk link for more information about what Phorm, BT Webwise and deep packet inspection are, and why yo should be worried.
If, on the other hand you're not with one of these dodgy ISPs, you can click the link above to find out more.