Will Microsoft Be Assimilated?

I knew that I knew nothing about aQuantive. Here, for example, is something rather important that I didn't know I didn't know:

Information available from Atlas' Web site indicates the Internet software company employs extensive use of open source software including Linux, Apache, MySQL, and Solaris.

Software engineers at Atlas' Raleigh office do client/server development in C and C++, software maintenance and "scripting", and developing and maintaining custom reporting capabilities.

Other sought after skills include Unix development, JavaScript, and those for Windows software administration like SQL Server and IIS.

The use of open source is not confined to Atlas with the second significant business unit Avenue A Razorfish boasting "we also frequently utilize open source technologies".

There was a similar situation when Microsoft bought Hotmail, which was running on Apache and FreeBSD for a long time after acquisition. Since aQuantive is much bigger, we can presumably expect Microsoft to have even more difficulty assimilating it.