Top Twitter Picks & Lists for Internet Marketers Resource Center 

Publisher of Email Marketing Reports newsletter promotes best practices and challenges common email wisdom.

She heads Windows 7 Social Media team for Microsoft. Reports on socmed efforts and passes on tips and advice.

The 'everything-Social-Media' blog sends posts (10-12 daily) via Twitter. Watch for news on social networking/tech/gadgets/Google.

Google's Webspam Team leader reports on new Google Tools; explains how they work; sometimes helps troubleshoot user problems.

Lots of useful links on search marketing, digital advertising and publishing from ClickZ/Search Engine Strategies chief.

Experienced copywriter and ezine publisher coaches fellow writers/freelancers and has good links and retweets for resources.

Agency "gets" digital and social media. Tweets link to company and client presentations and chat about PR and socmed.

Expect links to blog posts covering tips and trends on Web metrics and analytics, client case studies and company press releases.

If you aren't already following ClickEquations on Twitter, add this stream to your list for relevant comments and conversation on all aspects of paid search management. Then, check out this list to see who the @clickequations people deem worthy of being followed more closely than in a standard tweetstream.

The PPC Allstars list is narrowly focused, and the people it features actually make money with PPC, as practitioner, agency or consultant. Some names you might recognize, especially if you're an insider: David Szetela of Clix Marketing, Dan Perach of PPC PROZ, and Copyblogger (Brian Clark).

Veteran Twitterer who loves digital communication and high tech. Talks to bigwigs and reports the best of what he hears.