I've seen one such tool this year - actually it was a ranking reports tool that tried to integrate any "Universal Search" entries beyond the ten basic organic links. The results I checked at the time were uneven - maybe the SERPs keep changing or other peculiarities get in the way. We know Google doesn't like a lot of automated queries, for instance.
We don't discuss specific SEO tools by name here. However, such a tool does sound valuable and could be mentioned in this thread, if one exists and someone really likes it: Favorite SEO Tools [webmasterworld.com]