General DVD-related information and essential sites:

http://www.hddvdprg.com - HD DVD Promotion group; the official words on HD DVD
http://www.blu-raydisc.com/ - Blu-ray Disc Org a source of generalized BD info
http://homepage.mac.com/dvd_sp_Helper - John Brisbin's DVD Studio Pro Helpers (MPEG Append)
http://www.2-pop.com/ - the 2-pop DVD Creation and Authoring discussion forum
http://www.dvdcreation.com/ - check out DMN's DVD Creation discussion forum
http://www.creativecow.net/ - also has a DVD Authoring discussion forum
http://www.tully.com - Home of the “DVD List” - a must-read for DVD enthusiasts and pros, alike
http://www.dvda.org - The DVD Association (DVDA) is the Industry's worldwide trade group
http://www.emedialive.com/ - DVD Information of interest - Media, Drives, News - a research center!
http://www.medialinenews.com/ - DVD and Optical Disc Industry News and free email newsletter -
http://www.dvdinsider.com/ - DVD General News and Information
http://www.dvdinsider.com/ - Link specifically to DVD Titles currently in release, and historical stats...
http://www.info.apple.com/... - Replacing an internal ATA drive on a Mac G4 (install movie)
http://www.gnomedigital.com - DVD Authoring and Training, Consulting, DVD Project Mgmt. (that's us)

Manufacturers info and free stuff to download:

http://www.apple.com/ilife/idvd/ - Apple's easy-to-use Consumer DVD authoring program iDVD
http://www.apple.com/dvdstudiopro/ - Apple's powerful DVD authoring Program Suite
http://www.pioneerelectronics.com - Pioneer's website - full of product info in Support area
http://www.wiredinc.com - Vendors of the Media Press Pro Hardware encoder card
http://www.heuris.com - Heuris Technologies - makers of MPEG Power Pro Software Transcoder
http://www.sonic.com/ Sonic Solutions (info on Scenarist, DVD Creator, DVDIt, My DVD, ReelDVD)
http://www.recipe4dvd.com/docs/ - In here, you can find Sonic Solutions' primer on DVD