If you place the cursor on a variable in NetBeans (at least in Ruby code) it highlights all instances of that variable. This is a feature I like very much.

Does TextMate or some bundle have a similar feature?

I have also asked this question on StackOverflow. If anyone wants to get some points there: http://stackoverflow.com/questions/1259604/how-to-highlight-all-instances-of...

Best regards, -Markus-