I can't speak for all the lists [LINK] they made-up (on news that major search engines routinely omit and manipulate results of their top-searches) but these two seem to be spot-on accurate:
Flickr
- kitties
- super-saturated landscape
- photos with bad blur passed off as "artistic"
- blogger conference
- sky
- sky
- more damn sky
Technorati
- that blogger conference i saw on flickr
- spaghetti monster places of worship
- giztoto-- engageme-- cruncherbot-- whatever blog knows when i can get an iphone