I am offering advertisement space in the top right part of the header of GuardTunnel.com.
There is room for a 468x60 banner there. I will place your banner there and it will rotate with 4 other banners (at most). I will never place more than 5 banners in rotation at any time.
The cost is as follows:
You are NOT allowed to put proxy sites there. I do not want competition. You are allowed to advertise any other site, like topsites, forums, newsletters, etc.