Late Night or 24 Hour Restaurants

I'm tired of going on a wild goose chase for food after a late night outing. You'd think this city would have some late night/24 hour dining. Does anyone know of any late night/24 hour dining places in Prospect Heights and vicinity? The only thing I've seen is a restaurant around 3rd and 7th ave. I know Soda's kitchen closes pretty late, but that's about it. Any suggestions are appreciated.