TFS Capacity Planning

bharry posted a blog talking about TFS Capacity Planning that everyone shout take a look at

We've tried to be very conservative - generally rounding down the actual
results we achieved by 10-20%. Of course every team varies and if you have a
team of people who run queries every 30 seconds all day, you'll need more server
than we're recommending here. These numbers were based on the load we've
experienced using TFS internally for the past year or so. Again, you can read
more detail in previous blog posts but this turns out to be about 0.1 peak
requests per second per user.