Not hundreds of thousands though?  Somebody must know the answer - one of the moderators or somebody.  It would be interesting to know, so that you can then work out the best time/day to advertise to get maximum exposure.  I'm surprise eBay don't plug it: "50,000 people sought items on eBay over the weekend!"  It strikes me the only time more people come onto eBays is when there is a "free weekend."