does anyone know about this?  someone at avenue a is asking me about it.  i figured someone on here would know the answer - thanks for your help. 
Online ad management firm Falk eSolutions AG has bowed technology that detects pop-up blockers and automatically converts pop-up and pop-under inventory into alternate rich media formats, mostly floating ads, on the fly. 
The new tool is intended to compensate for incidents of failed pop-up impressions, which have likely risen sharply as consumers have increasingly embraced pop-up blockers such as those offered through the Google and Yahoo! toolbars. 
http://www.clickz.com/news/article.php/3345761