Google Buzz: How to hide your full name in your Google Profile
Posting an update to Google Buzz currently (16-Feb-2010) requires that your full name is displayed publicly on your Google Profile (a page at www.google.com/profiles/your_id_here). I personally prefer not to associate my surname with my online pseudonym so found a way to hide my surname from my Google Profile while still being able to make public Buzz updates.
To remove your surname (or change your entire name) on your Google Profile:
1. Go to http://www.google.com/profiles/me/editprofile and change your First name and Last Name to whatever you want to appear on your profile.
2. If you use Gmail and do want your real name to be displayed when you send an email, go to Gmail > Settings > Account and Import and change the Send Mail As name to be your full name instead of the pseudonym you chose for your Google Profile.
Voila, simple. I've yet to notice any negative consequences with other Google services, eg. Google Checkout, as a result of the Account name change, but will update here if problems arise.