Nudge users towards goals with annoying CSS3 arrows
andyshora.com
andyshora.com
At least they're honest.
I wonder how it performs on iOS/Android devices?
It performs surprisingly well on iPhone 4, no additional work done for mobile support, the mobile browsers tend to handle CSS3 animations pretty well. Perhaps if the animation was constant (as opposed to an easing transition) it would be less jerky, but then it would be extremely annoying!
Also, inevitably there will eventually come a need for an orange one pointing to their how-to video. "Don't forget to sign our guestbook!" "Also, this other thing is kind of important." Just use better page design rather than greebling your existing one.