Who isn't on a social networking site these days? I consider myself very computer savvy and an avid surfer of the Internet, however not even I really know what a Twitter is or how many calories one might contain. On the other hand, I do write blogs (obviously) and maintain my blog page, I maintain a website for my photography, I have a profile on Facebook, I had a profile on MySpace up until about a month ago, and I have a couple photo-sharing sites that I seldom do anything with. I ditched the MySpace profile when I just suddenly realized that I never log on anymore. When I would randomly jump on, I would immediately log back out after seeing...