If Mitt Romney pulls this out at the last minute, it's going to happen in the Interstate 93 corridor, home of many Massachusetts transplants. Draw a line from Manchester, down I-93 to the Mass border, this should be Romney territory: Manchester, Bedford, Merrimack, Litchfield, Londonderry. And toward the border, keep an eye on Derry, Salem and Windham. If Romney is not winning these places convincingly, things probably aren't going well for the former Massachusetts governor.
Also of interest for Romney is the Lakes region (Belknap County), where he keeps his summer home.
McCain's areas of strength form an arc around the I-93 corridor: Keene and Cheshire County; the Hanover/Lebanon area; Merrimack County, especially around Concord; and the Seacoast area (from Epping eastward to the ocean). Expect wide margins for McCain here if he has indeed put parts of the old coalition (moderate GOPers and Republican-leaning indies) back together again.
Enjoy the evening! We'll try and update here as we can during the evening. And I'll be up on NH public radio tonight -- www.nhpr.org.