it's all about writing code in a responsible manner.Every feature could be abused , like creating methods with a single line and methods with 2000 lines of code. It's upto the dev to use it properly.
It would been cool , if I can generate model classes from DB Tables directly. I saw the youtube demo and not impressive with just a javascript code editor.Still then VIM is the way.
Why dont you can have some activation code mechanisam for using your app , which users gets only from you ? . That way you can activate only paid apps ?
I like G+ because , of the circles. I can have long discussion with interested ppls , without inference and >=140 is the strength and weakness of twitter. Facebook brings in too much of junk.