I was perusing another forum today and there was a link for a finding whether any of your pictures have made it to Flickr's Explore. I've looked a million times before, but the Big Huge Labs app always said I had no pics in explore - today I tried flickr-explorer.com and it showed that I had two pics make Explore on 6/6/08.

Here are the links, post up your Explore'd pics:
Exploring Flickr - Find your photos in Flickr's explore section <- this one worked better for me
Scout: Find your photographs in Flickr's Explore <- doesn't work for me

My Explore'd pics: