Here's some new info re: EWR:

"United Airlines . . . is hopeful that it will be able to resume inbound flights to Newark by early Wednesday afternoon, airline spokesman Charles Hobart told Huffington Post Travel via email."
http://www.huffingtonpost.com/2012/1...n_2044102.html

Even if this turns out to be true, it doesn't give full info about any particular flight. Because of all the cancellations, many of UA's airplanes and crews are now in the wrong place, it will take them a certain amount of time to sort that all out.