I actually messed around with Thing 6 while I was working on Thing 5 because the two Things are very much related. In fact, I’d say Thing 6 was a continuation of Thing 5. Both were about experimenting with different ways to use your photos. While Thing 5 was about mashups, Thing 6 had us exploring online image generators.
The good thing about Big Huge Labs, at least with what I tried, is that I didn’t have to sign up for either service in order to play with them. I didn’t even have to have a Flickr account as the Warholizer allowed me to upload an image directly from my computer.