Top Twitter Picks & Lists for Internet Marketers Resource Center 

What companies are on Twitter, and what are they saying? This list is a mini-directory of official and affiliated tweetstreams for B-to-C companies, compiled by tech journalist Josh Weinberger, who writes for destinationCRM among other media outlets.

The 496 companies include airlines, telecom providers, sports teams, retailers, Twitter-specific services like Tweet Scan and Tweetburner and other digital-only providers. Look to this list not just for the official tweets but also company-sponsored enthusiasts and customer support reps.

AKA "Copyblogger." Runs no-nonsense site for writers and tweets with enthusiasm: advice, tips, pithy remarks, plus useful links.

"TheGrok" is all about Web conversion and analytics. Also a model Tweeter for post quality, mixing info and personality.

A retailer must-read. Tweets feature posts from his Retail Email blog plus commentary and advice on trends and tactics.

Social media guru with a strong business focus; author; even has his own gadfly impostor, "BritChrisBrogan."

This online veteran covers everything in tech (Internet, communications, even shopping) and laces Tweets with cheeky humor.

Tweets include advice, promote company presentations and Webinars and toss out discussion questions on metrics and analytics.

Social Media Marketing consultant and speaker. An original thinker who challenges conventional wisdom without being combative.

Search guru and prolific link-sharer. He focuses on search marketing, plus new technology, Web and Social Media.

AKA "Problogger." Tweets on better blogging; blogs about better Tweeting. Good advice with a twist of Aussie humor.