After Digg is finally implementing Facebook Connect. In the next few hours Facebook users will be able to log into Digg with their Facebook credentials and use the site as if they had spent the time registering. It will also push their activity back to Facebook so their friends can see what they've been digging, and let them find other Facebook users who are using Digg too.that it was on the way,
This move is definitely a win-win for both parties. Users of both sites have long been able to post stories they've dugg to their Facebook profiles through various third party Facebook apps. The real magic here is that Digg will have an alternate way for newcomers to use the site in a way where long-term usage can be tracked and promoted back over to Facebook users who have not yet registered with Digg (and no longer need to).
Still missing from Digg's log-in options, and what was originally unveiled when Facebook Connect was announced, is support for OpenID. Like with Facebook Connect, this would let OpenID users log in with their OpenID credentials. However, it's likely taken the backseat to the implementation of Facebook Connect since there are fewer ways to resyndicate that segment of user activity.
Update: I just tried this out on my account, and what's nice is that if you're already a registered Digg user it simply links up your two accounts and finds your Facebook friends who are also Digg users. You can also choose which actions on Digg you want syndicated over to your news feed back on Facebook. You might want to double check these settings if you're the kind of person who leaves, creepy or otherwise not-safe-for-Facebook comments on Digg. Screenshot after the break.