Font comparer

Very cool! I'd like to see something interactive like this for programming fonts. I've done a little exploration in this space, too:

http://1overn.com/2011/01/31/iterating-on-font-pair-comparis...

That's pretty nice...would be certainly helpful if it can allow us to use the different font sizes so we can test a lot more on one shot.

Here's something else along the same lines:

http://www.typetester.org/