Trends of technology

It would be of interests to watch the trend of technologies. Below are some websites:

http://trends.builtwith.com/ - show deployment technology of websites.
http://news.netcraft.com/ - show deployment technology of websites.
http://www.google.com/trends/ - show search trends
http://www.tiobe.com/ - for programming languages
http://langpop.com/ - for programming languages. (This site is for sale as of November, 2011)

Statistics and Analysis of IT technique usage in different area

Statistics and Analysis of IT technique usage in different area (in Chinese)

Summary:
C/C++ is strong in system level software.
.NET is strong in enterprise applications.
Java is strong on web server side. Php is good too.
Ajax/JavaScript is strong for RIA (Rich Interface Application). Flex is 1/10, and Silverlight is 1/100.