You have to be careful to do major registrations quickly. I registered the twitter account (made a tweet), registered the facebook account (added only some very basic profile information), and then went to register the Google account only to find out it was already taken. My company name was (random two digit number)[no space](uncommon word). I did extensive searches in Google and other places before I decided to use it.

It was probably the tweet that got me into trouble. I'm kicking myself for not realizing that would happen before hand.

I should have registered everything (including the domains) as quickly as I could (in near immediate succession). Only after that should I have started tweeting or filling out any information beyond what was required to establish ownership over the accounts.

Now, I'm sure there's someone out there who hopes to either sell me the google account, or attempt to use the google account for financial fraud.

I recently did this exact thing for an upcoming venture -- didn't want anyone beating us to it.

Similarly, registering the facebook account couldn't hurt.