With BizSpark or similar, you're looking at something like $400 total to get as many copies of VS.NET as you need for your entire team. And all the other dev tools everybody needs. And Windows licenses for all their boxes. And Office. And everything else Microsoft makes.
So even assuming a team size of one, it's still closer to free than it is to a day's worth of your bill rate. Considering how much better the paid version of VS.NET is than the "Express" version, it's not even something worth thinking about.
Given that, the fact that the Free version does this or doesn't do that has pretty much zero bearing on the life of a guy writing software on the Microsoft stack.