Brian published a few screen shots of tools that we are working on right now for the next major release of TFS (not SP1). The Branch Visualization (Scenario 2 and 3) are amazing but right now my personal favorite is improved history (Scenario 1). While working on my feature I was doing some forward merges and resolving conflicts (fun, fun, fun ;)). Being able to display history and track the changes in time to understand why a line of code changed in the way it did would be invaluable. Unfortunately it's utilizing new server calls so chances for powertool including this functional are smaaaaal.