W3.org:

W3.org has 287 URLs listed in 163 Dmoz categories.

Television and the Web
W3Cs section on specifications for the emerging technology.
http://www.w3.org/TV/
Top/Arts/Television/Interactive

Information and Content Exchange (ICE) Format and Protocol
W3C-proposed format for document exchange and reuse management in traditional publishing contexts and business-to-business relationships.
http://www.w3.org/TR/NOTE-ice
Top/Computers/Data_Formats/Document/Publishing

W3C Overview of Web Graphics
Information from the World Wide Web Consortium on format comparisons, integration into HTML and XML.
http://www.w3.org/Graphics/
Top/Computers/Data_Formats/Graphics

Graphics Interchange Format
Original specification describing the file layout as originated by CompuServe. Also known as Gif87a.
http://www.w3.org/Graphics/GIF/spec-gif87.txt
Top/Computers/Data_Formats/Graphics/2D/GIF

W3C: PNG
W3C overview of PNG. Includes browser tests to see if gamma and alpha work correctly.
http://www.w3.org/Graphics/PNG/
Top/Computers/Data_Formats/Graphics/2D/PNG

PNG Specification
The official W3C recommendation specification for PNG.
http://www.w3.org/TR/REC-png-multi.html
Top/Computers/Data_Formats/Graphics/2D/PNG

www-svg@w3.org Mail Archives
Official discussion forum.
http://lists.w3.org/Archives/Public/www-svg/
Top/Computers/Data_Formats/Graphics/Vector/SVG

W3C Scalable Vector Graphics
The SVG home page at the World Wide Web Consortium. Includes news, description, specification, and history.
http://www.w3.org/Graphics/SVG/
Top/Computers/Data_Formats/Graphics/Vector/SVG

www-svg@w3.org Mail Archives
Official discussion forum.
http://lists.w3.org/Archives/Public/www-svg/feed.rss
Top/Computers/Data_Formats/Graphics/Vector/SVG