Introduction : a linguist in the blogosphere -- Genre : what is a blog? what is a wiki? -- This text and other texts : creative linking -- Place : where is a blog? -- Time : now and then -- Audiences: a checklist on engaging readers -- Opinions : where do I stand? -- Evidence : how do we know? -- Collaboration : 'history' pages on Wikipedia -- Arguing : 'talk' pages on Wikipedia -- A note on studying the language of blogs and wikis.