a banner ad is served

Nice infographic on how an ad placement happens - 

http://cmsummit.com/behindthebanner/

CreateJS banner

A little heavy but look at those vector animations!
http://sandbox.createjs.com/ToolkitBannerAd/garyad.html

Actually under 100k, with class files, if zipped.

Responsive ads... waht a concept!

This fellow has a "responsive ad checker"
http://matthewjamestaylor.com/responsive-ad-checker

I think it will take a while for the slow-moving display advertising industry to stop thinking in terms of 160x600, 300x250 and 728x90, but it will happen.

instant banner $14.95

I found it amusing. Nice flash effects! small k size too.

http://www.flashbannernow.com/instant-flash-banner.php

a rebuttal on Digiday

debunking those '15 alarming stats' from a month ago -
http://www.digiday.com/publishers/5-unalarming-stats-about-banner-ads/

patent pending

http://tech.fortune.cnn.com/2013/04/30/sony-patent-is-hilarious-terrifying/

IAB announces html5 ad spec recommendations

Even though

it is too early to declare a guideline or specification for HTML5 ads

They are just coming short of doing this.
Display ads should have a border, live in an i-frame, be 75-100k including fonts and libraries, etc.

http://www.iab.net/about_the_iab/recent_press_releases/press_release_archive/press_release/pr-050613