So to make life a little easier, you now have to have an OpenID account to login to this site. Only users who have logged in can create/change tickets, wiki and post comments to my blog.
There are quite a few OpenID Providers, so it should be quite easy. You may already have an OpenID!
However, due to how the OpenID plugin works with Trac your username will look a little odd. This is because your OpenID is basically a FQDN, just like a web address. So it's best to use a provider like !http://
You can see from this post that my OpenID is roy.marples.name, which shows that having your own domain and OpenID server is important if you want to look good ;)