My take (dannyr and I built this) -- this is like an "about.me" but for developers. You add your GitHub account, add your programming languages, etc. And (my favorite) you add all the projects you are building -- for example when you add an Android app, it automatically links to the Android Market, pulls in the app icon, etc. This is meant for developers to have a decent place to showcase their geek. (And the domain…
forrst.me also has more traction, and they are both formidable competitors, so I'd love some great selling points.
What would make your service very, very interesting is to focus entirely on creating a presentable mix of a personal homepage and a resumé - GitHub, Stack Overflow, Codelesson badges(!), and such. LinkedIn isn't that interesting in many regards, and it'd be great if you found the key to a good resumé and used that to build your foundation on.
forrst.me is more of a social web discoverability tool, while flavors.me creates easy-to-make web presences.