Unique player name/codes to better track who is who.

The first name being initiallized sometimes makes it harder to keep track of who is who unless I go through the trouble of going through the smartphone app.  When will there be some unique non-changeable identifier part in the name, would help immensely with the ability to add direct chat commands like 

p (opens direct chat) uniquename blah blah blah

having to go through the smartphone app is very distracting to the ride.

Other than that, great work on Zwift! enjoying it immensely!

oops i forgot to add, the display could still have firstinitial.fulllastname, just the display could work like

uniqueid firstinitial. fulllastname optionalinfo