Its Microsoft, but I'm still happy about it. Always a good thing to have a test like this. Hopefully very soon the numbers will be 100% across the board.
The test262 suite was actually published by the ECMA international standards body, although Microsoft did contribute their tests.
The direct link to the suite is http://test262.ecmascript.org/
And the announcement from ECMA international is at http://www.ecma-international.org/news/PressReleases/PR_ISOI...