Also you can read the news and the Learn content on the Team Foundation Service welcome portal.
Team Foundation Service – As of today you can host Git repos in TFService projects. It is “shipping” now and ready for use. We still have lots more capabilities to add but it’s ready to use for real.
Team Foundation Server – Our plan is to include Git support in the next major release of TFS. No date has yet been announced.
Visual Studio 2012 support – We provided a VSIX today. It is a “community technology preview” of the Git VSIX on top of a “community technology preview” of VS 2012 Update 2 (VS2012.2). We’re very pleased with the performance/stability of it but it is not yet officially “go-live”. You are welcome to try it out but it is a preview release for evaluation, so be aware that there may be issues. We’ll be releasing updates about every 3 weeks and you should expect it to converge fairly quickly. I don’t know at this time when it will “RTM” but I expect it to have a “go-live” designation before too long.
Visual Studio V.Next – Our Git plugin will be integrated into all editions of Visual Studio V.Next (including Express) and will appear in the various pre-releases and RTM.
Older versions of VS & TFS – At this time, we are not planning to include Git integration in older versions of VS or TFS.