Sometimes I’m active on Stack Overflow, though not as much as I used to be. I recently started uploading some of the projects I have been working on in my spare time to GitHub. I also have an account from the very early days of Microsoft’s Channel 9 on MSDN.
I think you can tell a lot about a person by what they read. My books are all cataloged on LibraryThing. You can see what I’m reading at the moment in the Currently Reading collection. Occasionally, I share interesting reads in the books category.