The IE blog announced today the development tools that they plan to include in IE 8. As a developer, I am pleased to see a FireBug like interface:
Improved Productivity Through Internet Explorer 8 Development Tools.
The company Mofuse has a toolkit that allows you to convert your website into a mobile version, targeting specific platforms. While it is better to design in a standards compliant way and only maintain one version of your site. Sometimes, the manufacturers just wont let you. Check this out:
Also, Christian Heilmann talks about YUI evolution: