The Hampton Inn and Suites at http://www.hamptoninnandsuitesnewark.com/ is less than one mile from the campus. The discount rate there is $119 plus tax with the group code of DIC. It includes free continental breakfast, free internet, and a microwave oven and a refrigerator in the room. The hotel also provide shuffles to the Newark airport, the Newark Penn Station and the campus.
Hilton Newark Gateway is right next the Newark Penn Station. If you are making your reservations online, you should request the rate for DARTS conference to ensure the 159.00 rate. If you are making the reservation by phone you can request the Rutgers University rate. The room block will be in effect until March 21, 2007 at which time the rate will increase to over 200.00 per night.
See here for information of other hotels.
It can be time consuming and inconvenient to stay in Newark for the Saturday and Sunday AMS meeting in Hoboken. Hotel recommendations of the AMS meeting can be found at the AMS Special Session website.
If you decide to stay in Newark and commute to Hoboken for the AMS meeting, see here for commuting information.