Using IAR's compiler for ARM at work, one of my most-used IDE capabilities is:
"Go To Where Defined"
I click on a variable, constant or function name and choose "Go To Where Defined" ... the editor jumps to/displays the file and line where the symbol is defined. Saves a lot of time working with a multi-file project. Really improves productivity.
Does the conflab of VS 2010 with AVR do this? I think it's difficult to implement because the editor has to have the symbol table from the prior compilation.