But if you actu­ally want to secure your unique name, you gotta be quick, because:

Start­ing at 12:01 a.m. EDT on Sat­ur­day, June 13, you’ll be able to choose a user­name on a first-come, first-serve basis for your pro­file and the Face­book Pages that you admin­is­ter by vis­it­ing www.facebook.com/username/. You’ll also see a notice on your home page with instruc­tions for obtain­ing your user­name at that time.

That’s what the offi­cial blog says — and what’s even more impor­tant: once you chose your unique user­name, it’s here to stay — no change of mind later on. And it’s first come, first serve — so be quick!

The unique user names must have at least 5 (alphanu­meric) chars:

Face­book user­names will be avail­able in basic text forms, and you can only choose a sin­gle user­name for your pro­file and for each of the Pages that you admin­is­ter. Your user­name must be at least five char­ac­ters in length and only include alphanu­meric char­ac­ters (A-Z, 0–9), or a period or full stop (“.”). While user­names are cur­rently avail­able only for Roman­ized text, we’re look­ing at how we might sup­port non-Romanized char­ac­ters in the future.

I really won­der if the major­ity of users will use their real name, their nick­name or try to secure pop­u­lar key­words. The race starts at 12.01am EDT on June 13th — good luck!