On Tuesday Facebook created quite a rush with the announcement that Facebook usernames were coming. The rules were carefully explained by Inside Facebook and the Facebook Developer Blog provided an advance screen shot of what will become available on Saturday morning.

The reactions were a mixture of resignation and inevitability with frequent admonitions to get on line. Six Pixels provided the short list explaining why you want one and Marketing Pilgrim analyzed the 'off page' aspect of reputation management.

There were several thoughtful bloggers who didn't react positively to something that Inside Facebook described as 'a step toward @addressable identity'. Chris Messina seemed to lead the faction warning that the development of digital identity was dictating human behavior when the opposite should occur and Alexander Van Elsas followed with the concern that people were allowing sites to easily lock-in their personal identities. Regular Geek addressed the growing concern that the 'digital identity for dummies' process had captured an unfortunate path of least resistance.

Meanwhile, there was some discussion of protective steps that brands (and some people) should consider by Saturday morning. Digital Media Law advised on the legal aspect of protecting your name. If you happen to be one of those looking to take false advantage, CenterNetworks listed Britney, Obama and 23 other usernames that are already crossed from your list.

• Tweeting for Customers: A Twitter Primer for CRM (Inside CRM)
• The Do's And Don'ts Of Online Reputation Management (Search Engine Journal)
• State of the Twittersphere (Hubspot)
• A Roundup of Twitter Tracking Tools (Social Media Today)
• 3 Free Live Traffic Trackers for Social Media Campaigns (Search Engine Journal)
• 4 Reasons Why Marketers Should Choose Facebook Pages Over Facebook Groups (Inside Facebook)
• Should a Facebook Page Be Part of Your Digital Marketing Strategy? (Marketing Profs)
• 13 Social Media Marketing Firefox Addons You Should Be Using (Ignite)

• 3 New Comparison Tools for Google and Bing (Page Traffic Blog)
• How To Use Long-Tailed Keyphrases in Your Linking Campaign (Search Engine Land)
• Is Your AdWords Copy Powerful? (Reve)
• Evaluating Reliability of 4 Keyword Tools (Shimon Sandler)
• A New Way to Find & Add Negative Keywords in Adwords (PPC Hero)
• 5 Great Examples of SEO Friendly JavaScript & CSS Menus (Florida SEO)
• Take the Blind Search Taste Test! (AltSearchEngines)
• SEO for YouTube - How to Search Optimize Video for B2B Marketing (HubSpot)
• What You Need to Know about Google AdWords' New Conversion Tracking Metrics (PPC Hero)
• Twitter SEO: 4 Simple Tips to Help Your Twitter Profile Rank (Search Engine Journal)

• Web Design Tips: The Laws of Ecommerce Navigation Design (Practical Ecommerce)
• 25 Stylish Examples of Web Forms (Six Revisions)
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• 8 Excellent Tools for Optimizing Your Images (Six Revisions)
• Beautiful High-Quality Free Fonts For Your Designs (Smashing Mag)
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• Styling buttons as links allowing you to POST away (Ajaxian)
• 10 Tips for Incredible Web Forms! (Design Reviver)
• Introducing Page Speed (Google Webmaster Central)

• Metrics That Matter: Are You Measuring the Right Stuff? (Email Experience)
• Why an unsubscribe link option is better than an unsubscribe email one (The Touch)
• The Email Standards Project (Stream Send)

• The Complete Google Analytics Power User Guide (VKI)
• Does Google Analytics overstate the value of search? (Econsultancy)
• How to Analyze Referring Traffic (Kissmetrics)

• New Version of Safari Browser Incorporates Coverflow to Search Web History (Search Engine Watch)
• StumbleUpon's Su.pr is Really... Super (Brent Csutoras)
• Barry Diller: The Internet's free phase is coming to an end (Econsultancy)
• Twitter Bumps Ceiling (Batelle)
• Microsoft XBox Natal - Changing the Face of Gaming (Web Analytics World)