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Gigaom: Flickr Co-founder Launches Slack, an All-in-one Messaging Tool Designed to Kill Email ForeverAllTwitter: Twitter Testing Photo Heavy, Facebook-A-Like Profile RedesignInsideFacebook: 4 Reasons to Target Email Subscribers with Facebook AdsLostRemote: How Bill Maher Is Enlisting Social to Unseat an Incumbent Member of CongressThe Verge: Time Capsule Containing Steve Jobs' 1983 Apple Mouse Excavated

Gigaom: Flickr Co-founder Launches Slack, an All-in-one Messaging Tool Designed to Kill Email Forever