The official website www.cesweb.org breaks it down into these catagories: (along with my comments)
Audio – The Classic iPod is still my favorite portable media player.
High-Performance Audio
Digital Imaging
Emerging Technology – iPhone, Apple Tablet, Google Droid, GPS, ???
Gaming – The Beatles are finally in Rock Band; what’s next for Xbox 360, Playstation3 and Wii?
Home Networking – When is total wireless connectivity coming?
Home Theater/Video
In-Vehicle Technology – We really need a spiffy name for this, like AutoTech.
Wireless – I just love the Acer AspireOne Netbook I bought last year, it’s so portable it works anywhere!

I’ve been following different tech sources to keep up with CES news, and I’ve listed them here:

CES Official Site: www.cesweb.org

CES on Facebook: www.cesweb.org/facebook

CES on Twitter: www.cesweb.org/twitter & twitter.com/intlCES

Mashable mashable.com

Mashable on Twitter: twitter.com/mashable

Engadget: www.engadget.com

Engadget on Twitter: twitter.com/engadget

Amazon.com has list prices marked out with sale prices listed in red on thousands of items, like Guitar Hero On Tour $29.95, Kingston 16GB USB Flash Drive $24.99, plus DVDs for $4.99, Blu-ray $10.95, and CDs under $9.00.

BestBuy.com started their 2-day sale on Sunday, with a 40-inch 1080p Toshiba LCD HDTV priced at $799.00, an Asus Netbook with 8.9-inch widescreen, 1GB memory, built-in webcam and 16GB hard drive for $279, and an Acer Aspire Laptop with a 12.1-inch widescreen, 3GB memory, 250GB hard drive and DVD burner for $799.99.

CircuitCity.com has the Sony Cyber-shot Digital Camera for $109.99, Apple’s 8GB iPod Touch for $226.99, and a SENS 8-inch Widescreen portable DVD player for $119.99.

Dell.com is finally offering laptops and notebooks under $500 now.  Their Inspiron Mini 9 is priced at $299 and comes with Linux installed, a 4GB Solid State Drive and an Intel Atom Processor.

eBay has their One Dollar Doorbusters through December 8th, like an iPod 8GB Nano or a LEGO Star Wars Republic Gunship.

OfficeDepot.com is offering deals like, buy one and get the second at 50% off.

Overstock.com has some good prices too.  For example, they have a large selection of LCD TV’s, some refurbished units and some brands I’ve never seen before, like the Hannspree Flora 12-inch LCD TV.  Like amazon, overstock offers savings on a wide variety of merchandise including furniture, clothing, shoes, jewelry, electronics and home items like bedding and housewares.

Sears.com is advertising online only specials like 10 to 50 percent off Tools, 15 percent off Appliances, and an extra ten percent off Fine Jewelry and Watches.

A lot of sites like Target.com are offering Free Shipping on orders of $50 and up, depending on what you’re buying, like clothing or furniture.  Target makes it easy to shop online by offering specials by price, where you can select gifts for under $25, $50 or $100.

Walmart.com has 2-for-$30 Game Bundles for Nintendo Wii, Nintendo DS, and Xbox 360.  They also have the cool new Flip Video MinoHD 60-Minute High Definition Digital Camcorder bundled with a free tripod and case for $219.88.

KeepCash.com also features daily product deals and has online coupon codes for most major retailers.  They’re one of many sites that are tracking all the holiday sales like Black Friday and Cyber Monday.