It seems to be a little old - May 6, 2001. Also, it seems to be focused on small solutions - large solutions can be useful, too.
Someone on MHF has an example of equal sums of like powers in their signature, but I forgot who. I looked around and found Swlabr has , but that's not the one I was thinking of. By the way, is Swlabr's counter-example to FLT some kind of inside joke?
Yes, that's it.
The site in question seems to be looking only for cases with the same number of terms on both sides. Of course, I suppose you can set some of the numbers to zero. Also, they are looking for cases where the equation is true for multiple exponents. Here's an interesting example from the site: