On Saturday at 12:01am Eastern, Facebook began lettings its 200+ million users register ‘usernames’.

Based on some Twitter posts from Facebook employees, it seems that over 200,000 names were registered within a matter of minutes.

So, if you’re a Facebook user, I strongly suggest that you go and grab your name ASAP. After all, just like domain names, MySpace URLs, or Twitter names, there is only ONE of each name available and once it’s taken, there is nothing you can do.

There was some speculation that Facebook would not be able to handle the massive influx of everyone registering their username, but so far a day into the madness, all seems to have gone smoothly. Kudos to your Facebook! I have heard some reports of pages loading slower than usual and also heard claims about people not being able to register usernames even though they were available, but those are pretty small hiccups compared to the explosions that could have occurred.

I’m sure this username initiative is going to cause some problems for Facebook. Corporations will undoubtedly have their lawyers working feverishly over copyright/trademark claims and users will become frustration when they cannot even get their own name. But, I’m sure they have a plan for that… or if they didn’t see that coming, they’ll wish they did.