Yes! Please please please implement BrowserId. This is the one authentication/login system that actually has a real fighting chance. We've implemented it for our site (next to FB login) and we are really happy with it.
The browser integration will be amazing when its ready, but until then, it is the closest thing to FB auth without requiring FB or people to give up their friends list or other information they are concerned about.
I'm not sure what 'crucial component' you are talking about, but we are just using browserid.org.
I'm looking at implementing this for a new site...