Hardware Manufacturer
B&K, Carada, Denon, DirectTV, Dish Network, DVDO, Emotiva, Harmon Kardon, JVC, Magnepan, Marantz, Onkyo, Oppo, Outlaw, Parasound, Pioneer, NHT, Samsung, Sony, SVS, Tivo, Toshiba, URC, Whisperflow, Yamaha,

Software
Audyssey, CyberLink, DScaler, DVD Genie, Entech, Intervideo, Midiman Drivers, Theatertek,

Cables
Better Cables, Blue Jeans, Cable Asylum, Jon Risch, monoPrice, Percy Audio,

Digital Photo
Canon, Digital Camera Resource, Digital Photo Review, Digital Picture, Fred Miranda, Imaging Resource, Kirk, Nikon, Photo.net, RRS, Scan Cafe, Steve's, Strobist, Wimberley,

iPod
BSE, Contour, Dice, iLounge, iSkin, Power Support, VAIS,

Buying Equipment
Accessories 4 Less, Audio Advisor, Audiogon, B&H, Best Buy, Costco, craigslist, Crutchfield, Dakmart, Digital Connection, Dish Depot, Dish King, HiFi.com, One Call, Projector People, Sears, Thomas Dist., Vanns, Videogon, Visual Apex,

DVDs
Amazon, Deep Discount DVD, DVD Price Search, Netflix,

Discussion/News
Audio Review, AVS Forums, dbstalk, Digital Bits, DVD Benchmark, Home Theater Forum, Home Theater Spot, Michael DVD Reviews, Pixel Magic SDI Forum, Remote Central, Sound & Vision,