You can try the latest builds of VersionOne with CommitStream installed at http://v1commitstream.cloudapp.net/VersionOne
You can see the testing page for just the CommitStream build itself at http://v1commitstream-test.azurewebsites.net
If you're a VersionOne developer and you need to see previous spike code, you can visit https://github.com/versionone/CommitStream.Archived