Very simple thought I would share as may be of use to some of you....
Locate your hosts file (you will need to have administrator rights and change it from read-only)
Windows - C:windows/system32/drivers/etc
Mac - /private/etc/hosts
Add these 2 entries on new lines at the end of the file
On windows 7/vista you need to search for it on the start menu right click - open as admin, then file - open and then find the hosts file. Click save from the file menu, and watch 40D without the adverts.
Can confirm it works, just watched fonejacker without the adverts