Some of you may already have come across this site but it is a useful resource for information on all aspects of broadcasting. The link below will take you to the 'Datacasting and Interactive TV' part of their white paper library which contains 15 or so white papers such as the following:

- The Fantastic Broadband Multimedia Distribution System
- Broadband Multimedia in Mobile Environments
- Broadcast Communications in Automotive Industry
- Broadcast Communications in Hi-Tech Manufacturing
- Network Video Computing
- TV Over ADSL
- Interactive Advertising
- Webcasting Everywhere
- Understanding Streaming Media
- All About Strategic Content: Macromedia Enables Dynamic Content With Purpose
- IEEE 1394 Brings Bandwidth, Simplicity, Lower Costs to Machine Vision, Scientific Imaging
- TeraLogic Janus DTVPC Decoder Chip and Reference Design
- Broadband Video Moves Into Mainstream
- DSL Speeds Employee Education, Lowers Delivery Costs

http://www.broadcastpapers.com/data/data.htm