Make ad changes without replacing code with Adsense
Yo Yo, after waiting for many years google atlast going to publish the special feature "Make ad changes without replacing code" . Quoting the feature from their site

This new ad management feature means that your ad unit settings (such
as colors and channels) for new AdSense for content ad units will be
saved in your AdSense account every time you generate ad code. Then, if
you’d like to change any of these settings in the future, all you do is
make the update within your account — you’ll no longer need to
manually replace the ad code on all of your pages. For instance, you
can quickly change the borders of all your 300×250 medium rectangles
from red to blue with just a few mouse clicks. Fancy! We hope that this
new feature will help you save time and will simplify the process of
optimizing your ad units.
Still we have to wait for few weeks to get it activated in our account. Eagerly waiting for the feature to be added in my account… Wait for your turn guys…