I'm wondering if you can do something similar to this functionality (available with Zend Studio 5.1) in Eclipse. There is an image of it in action here: http://tinypic.com/r/2d1pao1/6
As you can see, it doesn't just put a box around the starting brace like Eclipse does, it actually shows you the declaration. This is especially handy when you have a really long declaration and don't want to scroll up and find its beginning.