Thanks for playing and leaving such a detailed comment!
While I initially also wanted to add lip piercings, unfortunately piercings that need to move along with the character's different expression variations would take more time (which I currently don't have much of) to implement, especially if there are multiple styles. This is also the same reason there are no eyebrow piercing options, either.
The nickname is just a nickname to be used among friends, so it's not really a stage name. It's also just a fun little way to show the preferences of individual characters. For example, Kendra will only ever call you by your proper first name, same as how she uses Diana for Di.
I'm not sure if it qualifies as a proper smartphone, but the Sidekick let you check MySpace/AIM and was the phone that all the scene kids wanted back in the day, haha.
The game is also on Steam, and you can find it over here.