In Eclipse there is a feature I like very much (but is only for Java).
If you move the mouse pointer over a symbol, and wait 1-2 seconds. The symbol and all references are highlighted automatically on the current source file.
This is very useful to read the code, e.g. if you have to search for uses of a local declared variable.
It's like using "find references" with highlighting, but without the output in the find references window. And limited to the current open source file.
I think this feature is very easy to implement :-)
Unfortunately we are an add-in, and have to sneak around behind the IDE's back, so things that are easy when you control the IDE, as is the case in Eclipse are very hard for us.
For now the solution is to use Find References and turn on: VA Options -> Text Editor -> General -> Highlight references using
You could argue that the work around is actually a superior feature, since the Find References Results window has full keyboard support, allowing you to quickly move back and forward between the references