I stumbled upon TIOBE Programming Community Index website when researching about programming languages trends.
Java, C and C++ have been dominating the game for quite some time now, and I think it is going to remain the same for a while. PHP seems to be doing well and more so now with PHP 5's new object-oriented support. Ruby seems to be doing great too jumping from #19 to #10 in a year. I wonder if Ruby will become the next most popular web programming language.