I gave a talk recently about blogging (twittering, etc) and how we create online identities for ourselves. The slidecast is above. I wanted to explore some ideas, the main ones being: It is about identity, not technology X; Your identity will be constituted from several different tools/services; Your configuration and emphasis of those tools is part of what makes the identity (as well as what you put in them); An online identity is becoming default for academics now; All this is driven by really easy and diverse ways of sharing; There are numerous benefits to you as an academic. I concluded with two propositions, which you might like to disagree with: 1. Soon, your online identity will be your academic identity, 2. There is an online identity of some form out there for everyone.