Yes, there's definitely an overload..
the sift talk discussion here
http://www.videosift.com/talk/Time-to-Raise-the-Queue-Escape-Threshold
ended..here I among others I referred to how VS may look like in the future
http://labs.digg.com/bigspy/
I think more and more the LOLcats are dominating the sift..

In reply to this comment by persephone:
I didn't see your post, or I would have voted for it. That's a big problem with the Sift, I think. There's just so much material in the queue at any given moment, it's impossible to see it all, at all times, unless you become a total VS addict and spend your life plugged in. I think Dag secretly wants us all to succumb.

Hope you have more luck than I had,
http://www.videosift.com/video/Rosalind-Franklins-X-rays-contributed-to-unraveling-DNA