gedit is my editor of choice as a web programmer. Since it is completely pluggable the functinality is endless and with the File Browser plugin it can even work someone like an IDE. If you enable the Snippets plugin or create custom snippets items using AutoKey then you can have even more control over your code. Also if you install the Zen Coding plugin then you will wrtie code 5x faster at a minimum.
gedit is fast and powerful in it's own right and then adding zen coding it becomes a top contender for best editor for Gnome Linux