Login Update 4
Perhaps you've seen my checkins with FourSquare of the points of interest I see on my travels. As a step towards integrating their great service with my blog, I'm now introducing FourSquare Authentication! You can use your FourSquare Account to login to my site to vote for your favorite pictures and post comments on my posts. Enjoy!
On a related note, I do want to add Twitter Authentication, but they're sticking to the old, convoluted OAuth 1.0A instead of the stream-lined OAuth 2.0 that everyone else uses. I'll continue to work with Twitter's API and on building new features for all my fans (and just for the pure fun of it).