I love StumbleUpon and the StumbleUpon Shark. I use it at work (BigOak Stumble Account) and at home. I use it sparingly for any SEO support as the traffic converts poorly in any scenario and the links are not followed by the search engines. But sometimes the large amounts of traffic it can bring will probably be a good thing, if only for branding purposes, for your site. So today my jaw dropped when I gave a page a thumbs up and saw how many visitors it had from StumbleUpon. The page had 2.6 million viewers. To my knowledge that is the largest number of viewers I have seen for a StumbleUpon page. Please feel free to add any you have come across that are larger than this.
Even more amazing is the fact that this traffic seems to be consistent as this site as submitted back in 2007 and I stumbled it today (6/24/2010).
I am interested to see if anyone has seen a higher number. Please include the page in your comments.