Let's face it if you are on a big enterprise development project you most likely will have both platforms, Java and .Net. I am a big fan when it comes to using the right tool for the job. I have been lucky enough to see Teamprise in action on some heterogeneous projects I have been on. It's great to see a product like it harness the power and vision of the TFS platform.
Nice job goes out to the staff at Teamprise!