IE7 released along with standalone version

As you probably know already Microsoft "heard you" and have released Internet Explorer 7 with such new and exciting features as tabbing, and RSS support. (Sorry MS bashing is too easy an opportunity to miss)

But for the skeptic out there you can get a standalone version.

The standalone version though is not an official MS release, its actually put out by Tredsoft. There are some limitation as you would expect but for the developer out there it runs fine. What gets me is that this can be done, why don't Microsoft offer some kind of standalone (even if some feature have to be crippled) for developers to test on?