One of the key areas of delivery for the Web today is the compliance of Standards. Initiatives such as the WebStandards.org Project among many others help build awareness and help also improve future directions for the medium.
An important element of web development-design today are Content Management Systems (CMS), particularly lately where the use and adoption of Blog-like sites are so common and depend on them.
There is a great article in A List Apart this week which looks at Typepad, one content management system by the makers of Movable Type that has constantly been developed with Web Standard in mind.