Visual Studio 2010 just lost about 60% of my interest. IntelliTrace (aka Historical Debugging) is only available in the Ultimate edition. I don't even have to know how much Ultimate costs to know I'll never run it. I work at a small company and we just can't justify the cost of those high-end version.
Fortunately the Pro version still has the parallel debugging feature since that accounts for about 30% of my interest.