Been a big fan and user of OpenID for sometime now. What is OpenID you might ask, well if you don't know then you can read about it on their site.
Anyways, I was IM'ing with a good friend of mine and I just mentioned I saw a plug in for it. He asked me to install it on his blog and I did, then installed it on mine, and it was so easy I accidentally installed it on another blog I run. Within 15minutes I had OpenID installed, enabled, and configured on three blogs.
So go and get your OpenID now, I recommend MyOpenID but there are plenty of providers out there, and then you too can log into the world (un)known blog which is VanJohnson.com.