This is great. I think I blogged once (here), complaining that I couldn't change how my name appears on the receiving end's caller ID. It showed my legal name, William, but I wanted it to say Bill. The foreign girl in Sprint customer support clearly did not understand the concept of "nicknames" and she refused to allow me to change it. Maybe someone at Sprint read my blog post? Probably not.
Anyway, they now let you do it yourself online. You should see it under About My Devices under your type of phone, looking like this:
"Caller ID name" is set to [WHATEVER]