Behind the Scenes: On Today, Matthew Perry mentioned Aaron Sorkin had written the part of Matt Albie with Perry in mind, hence why his name is Matt.
While in developement: The Changes
** The name of the fictional network was changed from the original UBS to the more memorable NBS before the pilot was completed.
** The character of "Jordan McDeere" was originally named "Jamie McDeere."
** The character of "Danny Tripp" was originally named "Danny Moore"
** The character of "Karen" was originally named "Martha Moyer"