Apparently, nobody has ever submitted the AG community to Stumble Upon. So, I did.
If you don't Stumble already, you should. It sends you to random web pages that pertain to customized categories. I uze mine all the time, and have found some of the coolest websites ever with it.
It's the same as Digging a site. I don't see why they would object. If anything it would bring more people to the site because now it's in the Stumble system.