However, it turns out that to operate GameCentre, you cannot use a gaming name; you have to use your real name.
This is the second time Apple have pulled this stunt recently. I was all set to try out Ping, their music social network. And then I realised that, as a side effect, my real name would become transparent on all my App Store reviews with the user name BohemianCoast. So not going to happen.
So, sorry, I won't friend you on GameCentre. I may still use it, because I'm fond of achievements.
Why am I so precious about my real name on gaming networks? Duh, gaming networks! I do not care for my boss to know TEH AWESOME POWA of my leet skillz. Funny that.