We welcome feedback on these tests via Connect. You can log in with any browser and offer comments and suggestions and bugs on the tests. These are some of the same tests that we use as part of our engineering process in developing IE9.
As Ecma works through getting the official test suite up and running, we will publish additional tests to the IE Testing Center for the community. We will also, of course, submit these tests to the Ecma sponsored ES5 test suite.
Please visit the IE Testing Center and try them out. We look forward to reading your feedback on these tests as we work together to an official ECMAScript test suite for the community.