Plugin, that controls your advertisement codes (such as Google Adsense, <a href="http://2lx.ru/2008/09/zorka-udobnyj-cop-beguna/" title="Zorka (ru)" rel="nofollow ugc">Zorka (ru)</a>, counters/ratings, etc.) in begining and ending of posts. 
All the information (general, changelog, installation, usage) you need about this plugin in russian can be found here: <a href="http://2lx.ru/2009/02/wp-advert-manager/" title="WP Advert Manager" rel="nofollow ugc">WP Advert Manager</a>. 
It is the exact same readme.html is included in the zip package.
<h3>Development Blog</h3>
<a href="http://2lx.ru/" title="Блог неизвестного веб-мастера" rel="nofollow ugc">Блог неизвестного веб-мастера</a>

WP Advert Manager

Plugin, that controls your advertisement codes at your WordPress blog.

Jay Versluis

Once installed, head over to Appearance – P2 Header Ad and paste your ad code into the box.
Features:
<ul>
<li>preview your ad in the admin interface (see screenshots)</li>
<li>option to hide the ad for logged-in users</li>
<li>option to hide the ad for logged-in WP eMember users</li>
<li>works with and without a header image</li>
<li>option to show the same ad after the post content</li>
</ul>
I’ve optimised the plugin for a 468×80 pixel ad. Other sizes will work but may require your own CSS tweaks to make them look right.

P2 Header Ad

Works just fine! I'll use it for internal important notifications but definitely saved me some time for writing this feature myself :)

Nice!

Places a 468x80 pixel advert inside the header of Automattic's wonderful P2 Theme.

WP Advert Manager vs P2 Header Ad