The most useful thing to come out of this post for me is the knowledge of dummyimages.com, and specifically the aliases for the IAB standard ad sizes such as http://dummyimage.com/leaderboard/E/C. Great work by Russell Heimlich on that site, and the source code is MIT too if you want to run it locally.
Thanks I'm glad you like the ad sizes. My goal was to make it pretty hard to get a 404 while sticking to a format that's natural and easy to use. Originally dummyimage.com only had size parameters then peopel clamored for color and custom text thanks to another Hacker News post.
* http://dummyimage.com/ * http://placehold.it/
The most useful thing to come out of this post for me is the knowledge of dummyimages.com, and specifically the aliases for the IAB standard ad sizes such as http://dummyimage.com/leaderboard/E/C. Great work by Russell Heimlich on that site, and the source code is MIT too if you want to run it locally.