Hey! I saw your post over at the other blog and replied there, but I'm relatively new to that board, so you'll have to wait for a moderator to approve my response.
Copied and posted here too, in case they're slow:
It's really easy to get into the city from Newark. Penn Station is on 34th st. in Manhattan and a 45 minute train ride from the Newark Airport. You could also grab the PATH train and head in. You'd go through the World Trade Center station on your way to midtown.
If you want to see a show, I recommend downloading the TodayTix app first. You'll find some of your best discounts there.
