From: "(ljuser)" <email@example.com>
From: firstname.lastname@example.org (ljuser)
This will make nextel's service return the name of the user in the "From" field, as opposed to the word "webmaster".
In addition, with services like Nextel, many people have Two-Way service, meaning you can reply directly from your phone. Because of this, it would be nice if "email@example.com" were replaced with the users email address if they choose to make it public. In this fashion, replying to a user is simple.