Which accounts (twitter, gmail, etc) should I secure?
catone: All of them.  Or, more precisely, anywhere you either:1. may want to some day communicate officially with users, or,2. wouldn't want someone else impersonating youCheck out the list at http://www.usernamecheck.com/ (also handy for checking them) and then start registering. :)I wrote about social media cybersquatting in a blog post in October.  Might be interesting to read about the experience the company I work for had: http://www.sitepoint.com/blogs/2008/10/31/do-you-own-your-so...(Short story: someone else has their natural Twitter account -- @companyname -- and they were forced to use the somewhat clumsier @companynamedotcom instead)