If you had doubts whether or not it is worthwhile to submit your feedback to the Windows UX Taskforce, then have a read of this comment left by an anonymous Microsoft Windows developer/designer.
… Just know that this website HAS gained attention in the WEX org, bugs are being filed as new suggestions are posted, and many are even being FIXED for beta. I’ve been surprised at how many good, detailed bugs have been found; even features I own had bugs from Vista I wasn’t aware of. Keep submitting posts everyone! Screenshots are really helpful too. There are “real” ways MS takes customer feedback, including newsgroups and MVP forums, but this is one of the few “everyday user” sites I’ve seen that is really simple and straightforward. Great work, Long!
Keep up the votes and good submissions everybody!
Update: Whilst the authenticity of the author is disputable, the message and spirit can be confirmed by several other Microsoft employees.