There has been a number of interesting threads going on around this subject, particularly as it concerns Internet Explorer 7. A recent article by Kevin Yank does a great job of summarizing the dialogue that started with Molly Holzschlag's interview on the Vitamin. Also, Chris Wilson posted an excellent response about the IE's team commitment to standards.
Also, I'd like to remphasize my teams commitment to supporting standards. Over the past few years we have been working closely with WaSP and others in the standards community to improve the quality of standards support with our Web Platform (aside from the browser). ASP.NET 2.0 goes a long way towards this by emitting XHTML 1.0 Transitional and Section 508/WCAG conformant mark-up by default. We also recently released a set of CSS Adapters that makes it very easy to learn how to customize the rendering of ASP.NET controls to be more designer friendly (semantically friendly and CSS friendly). This is a first step on a path to continue to grow our CSS support at the platform level. Further, Visual Studio 2005 and Visual Web Developer 2005 Express Edition provide rich tooling support for standards by providing real-time validation of markup for standards like XHTML 1.0 Transtitional and Strict, XHTML 1.1, and browsers like IE, firefrox, safari, mozilla, etc. to simplify standards targetting. Not to mention this model is extensible so we can easily add new/changing standards and browsers into the tool. Lastly, we also have an accessibility checker in VS05 that helps validate developer created markup for Section 508 and WCAG conformance to help simplify the process of targetting those rules.
Through platform and tools improvements, and a renewed commitment to the browser I think Microsoft is on an excellent path for increasing our support for standards. My team, and me personally, like Chris and others, is extremely committed to this cause and our work (espeically on the platforms and tools side) is starting to show.
I hope you think the same, and would love to hear your feedback.