Delta Boeing 737-700 Question

Im not sure where to find the updates, but from what I understand is that Delta had ordered I believe nine or ten Boeing 737-700 all with winglets in which i also believe they they were swtched from the previous 737-800 orders they had.. What routes are the 737-700s going to use once the planes are delivered to Delta??? Or is there any site I can get more infomation?

"Hot and high" routes from ATL and JFK such as UIO/GYE, MEX and others.