I just watched this video from Google Test Automation Conference (GTAC) where Dr. James Whittaker (a Engineering Directory from Google) talks about / shows screen shots of a new tool called Google Test Analytics. In the actual screen shots the program is called Testify but it looks almost like a test coverage tool but in describing it he calls it a testing planning tool. A tool that contains and maintains all the important information that should be included in a test plan without being a test plan.
Dr. Whittaker talks about investing in early cycle testing and how this new program can help identify all the capabilities, components and attributes of a specific target. The goal (as he alludes to) is to create something that is entirely reusable and isn't, like most test plans today, throw away.
Check out the video here:
To see the screen shots of (I'm assuming it's a prototype) of Google Test Analytics or Testify check out the slides here. The screen shots start on slide 27. Slide 32 and beyond show some of the views a user can take to identify the different elements defined.
All I can say is hopefully this becomes a free (or cheap) application available soon!
It's also worth noting and/or viewing that Dr. Whittaker and his team at Google appear to have created a "heads-up display". He demos/ shows screen shots from GTAC 2010 and it looks pretty cool. The HUD pulls all existing bugs from the related app you are testing so its easy to find if a bug has already been issued, etc. Very cool tool as well.