I've been using WordPress for a couple of years now and never bothered to create an account here until now, because I've never had a good reason to. Unfortunately, the changes to the Admin screens in general and most especially to the Write screen have finally provided that reason.
Please, please, please do something about the new Write screen. As much as I hate having to hack core WordPress files, the changes introduced with WordPress 2.5 are enough of a leap backward that I'm seriously considering it. I love WordPress, but this is a serious case of function being overlooked in favor of form.
I author my own blog and co-author a second blog/podcast with two other people, both of whom are very disappointed with the new interface (including the Flash uploader, which is a pain point for another "idea", I suppose). I can only vote once, but if I could give this idea another 10 stars for my co-authors I most certainly would.