There is some progress at Microsoft's development of Internet Explorer. Reading the recently published IE chat transcript contains some interesting points:

• We support embedding/hosting WPF applications within IE but we don't natively support XAML
• We are making improvements to a lot of performance issues across IE, including memory leaks. Stay tuned for updates of the browser.
• In IE7 we do not support XHTML [content-type application/xhtml+xml]. We will treat it like HTML content.
• We will consider it [DOM method .addEventListener()] for a release after IE7.
• We have no plans in IE7 to support allowing customization of the RSS reader. This is good feedback for us to consider for future releases, thanks.
• Requesting foo.innerHTML on elements returns incorrect data [even in IE7, will be maybe fixed with further releases of IE] (mostly a formatting nightmare) (tags are not in the case specified, or specifically lowercase many of the attributes are not quoted properly, and self-closing tags are not self closed.)

So far so good. Microsoft, we are waiting for IE8. Especially regarding JavaScript support.