Hmm... that isn't particularly hard to do, if taking EIP is enough. The debugger plugin even already has that info available.
Of course it is a lot harder to do it correctly, as one line of source code usually maps several instructions. So actually, you would have to mark it like "statement goes from there to there, and EIP is here". That would require a backwards line translation... which shouldn't be too tough either, but it's not all too easy as the other thing.