I'm always curious about what languages are gaining or losing popularity. I queried google trends and got some surprising results. Just about every language appears to be declining. I'd be interested in hearing some possible explanations.
http://www.google.com/trends?q=ruby%2C+python%2C+.net%2C+perl%2C+lisp
http://www.google.com/trends?q=java%2C+c%23%2C+c%2B%2B%2C+html%2C+javascript&ctab=0&geo=all&date=all&sort=0
"Google Trends analyzes a portion of Google web searches to compute how many searches have been done for the terms you enter, relative to the total number of searches done on Google over time. We then show you a graph with the results -- our search-volume graph -- plotted on a linear scale."