My future plane has a name,
N410WF = November Four One Zero Whiskey Foxtrot
I wanted the plane model (RV10) and my social media initials (WF -We Fly For) in the the name. Using the tool at http://www.tailnum.com/ , I quickly found that N410WF was available. For $10 I was able to reserve the number/name with the FAA. Next step, custom hats and shirts.