BomberOnline is the center of carving on the web. Loads of instruction on technique can be found in the Articles section. Also check out the Carving Community, Bomber's daily forum of hardbooters.
The Carver's Almanac is a vast resource for gear selection, FAQs, tips and more.
Extreme Carving is, well, extreme carving. And they even have their own custom deck, the Swoard.
FreeCarve is a collection of carving-related forums.
CA Road info is great for checking road accessibility from the web; plug those toll-free numbers into your mobile phone, too.
Weather Underground provides ski conditions at all the major resorts in California.
National Weather Service is what we're watching on a daily basis.
Looking for a TahoeCarver on the mountain? Tune your FRS radio to
channel 5, subchannel 12.